(biology) Loss during evolution of the final stages of the ancestral ontogenetic pattern.
(linguistics) A shortened or contracted form of a word or phrase, used to represent the whole, utilizing omission of letters, and sometimes substitution of letters, or duplication of initial letters to signify plurality, including signs such as +, =, @.
(mathematics) Reduction to lower terms, as a fraction.
(music) A notation used in music score to denote a direction, as pp or mf.
(music) One or more dashes through the stem of a note, dividing it respectively into quavers, semiquavers, demisemiquavers, or hemidemisemiquavers.
Any convenient short form used as a substitution for an understood or inferred whole.
The process of abbreviating.
The result of shortening or reducing; abridgment.
abbreviations
abbreviations
noun
plural of abbreviation
abbreviator
abbreviator
noun
(Roman Catholicism, historical) One of a college of seventy-two officers of the papal court whose duty was to make a short minute of a decision on a petition, or reply of the pope to a letter, and afterwards expand the minute into official form.
A person who abbreviates or shortens.
abbreviators
abbreviators
noun
plural of abbreviator
abbreviatory
abbreviatory
adj
Serving or tending to abbreviate; shortening; abridging.
abbroachment
abdominoanterior
abdominohysterectomy
abdominohysterectomy
noun
(surgery) Removal of the uterus via an incision made in the abdominal wall rather than via the vagina.
abdominohysterotomy
abdominohysterotomy
noun
(surgery) An incision of the uterus, done through a surgical hole in the abdomen.
abdominoposterior
abductores
abductores
Noun
of. Sometimes used instead of abductor when referring to the anatomical muscles.
aberration
aberration
noun
(astronomy) A small periodical change of the apparent positions of the stars and other heavenly bodies, due to the combined effect of the motion of light and the motion of the observer.
(astronomy, by extension) The tendency of light rays to preferentially strike the leading face of a moving object (the effect underlying the above phenomenon).
(electronics) A defect in an image produced by an optical or electrostatic lens system.
(medicine) A deviation of a tissue, organ or mental functions from what is considered to be within the normal range.
(optics) The convergence to different foci, by a lens or mirror, of rays of light emanating from one and the same point, or the deviation of such rays from a single focus; a defect in a focusing mechanism that prevents the intended focal point.
(zoology, botany) A typical development or structure; deviation from the normal type; an aberrant organ.
A mental disorder, especially one of a minor or temporary character.
A partial alienation of reason.
The act of wandering; deviation from truth, moral rectitude; abnormal; divergence from the straight, correct, proper, normal, or from the natural state.
aberrational
aberrational
adj
Characterized by aberration.
aberrations
aberrations
noun
plural of aberration
aberrator
aberrator
noun
(optics) A device that simulates aberration in an image.
aberrometer
aberrometer
noun
A device that measures refractive aberrations of the eye
aberuncator
aberuncator
noun
A pruning device mounted on a pole, so as to reach high branches; a weeding machine.
abettor
abettor
noun
A supporter or advocate.
One that abets an offender; one that incites; instigates; encourages.
abettors
abettors
noun
plural of abettor
abhorrent
abhorrent
adj
(archaic) Inconsistent with, or far removed from, something; strongly opposed.
Abhorring; detesting; having or showing abhorrence; loathing.
Contrary to something; discordant.
Detestable or repugnant.
abhorrently
abhorrently
adv
In a manner, or to a degree, that is abhorrent; with abhorrence.
abnegator
abnegator
noun
(rare) One who abnegates, denies, or rejects.
abnegators
abnegators
noun
plural of abnegator
abnormalities
abnormalities
noun
plural of abnormality
abnormities
abnormities
noun
plural of abnormity
aborsement
aborsement
noun
(obsolete) Abortment; abortion
aborted
aborted
adj
(biology) Rendered abortive or sterile; undeveloped.
Brought forth prematurely.
Checked in normal development at an early stage.
verb
simple past tense and past participle of abort
aborter
aborter
noun
(derogatory) One who has an abortion.
(rare) One who performs an abortion.
One who or that which aborts.
aborters
aborters
noun
plural of aborter
aborticide
aborticide
noun
An agent responsible for an abortion (the destruction of a fetus); abortifacient.
The act of destroying a fetus in the womb; feticide.
abortient
abortient
adj
(archaic, medicine) Reproductively sterile or miscarrying.
noun
(archaic, medicine) Abortifacient; an agent producing abortion.
abortifacient
abortifacient
adj
(pharmacology) Producing miscarriage.
noun
(pharmacology) A drug or an agent that induces an abortion.
abortive
abortive
adj
(biology) Imperfectly formed or developed; rudimentary; sterile.
(medicine) Cutting short; acting to halt or slow the progress (of a disease).
(obsolete) Produced by abortion; born prematurely and therefore unnatural.
(molecular biology, transitive) To block a process or function.
(transitive) To put an end to; to do away with.
(transitive, law) To annul by an authoritative act; to abolish by the authority of the maker or her or his successor; to repeal; — applied to the repeal of laws, decrees, ordinances, the abolition of customs, etc.
abrogated
abrogated
verb
simple past tense and past participle of abrogate
abrogates
abrogates
verb
Third-person singular simple present indicative form of abrogate
abrogative
abrogative
adj
Tending or designed to abrogate.
abrotine
abrotine
noun
A colorless crystalline alkaloid obtained from abrotanum, C₂₁H₂₂N₂O.
abruptiones
absarokite
absarokite
noun
(mineralogy) A basaltic-trachyandesite rock containing phenocrysts of olivine and augite
abscessroot
absoluter
absoluter
adj
(rare) comparative form of absolute: more absolute
absorbefacient
absorbefacient
adj
(medicine) Inducing or increasing absorption (of a drug).
noun
(medicine) Any such medicine that induces absorption.
absorbent
absorbent
adj
Having the ability or tendency to absorb; able to soak up liquid easily; absorptive.
noun
(chemistry) A liquid used in the process of separating gases or volatile liquids, in oil refining.
(medicine) Any substance which absorbs and neutralizes acid fluid in the stomach and bowels, as magnesia, chalk, etc.; also a substance, e.g., iodine, which acts on the absorbent vessels so as to reduce enlarged and indurated parts.
(physiology, pluralized, now rare) The vessels by which the processes of absorption are carried on, as the lymphatics in animals, the extremities of the roots in plants.
Anything which absorbs.
absorbents
absorbents
noun
plural of absorbent
absorptance
absorptance
noun
(optics, physics) Absorbed radiation and incident radiation in a ratio format; a measurement that shows how well a surface absorbs radiation.
absorptances
absorptances
noun
plural of absorptance
absorptiometer
absorptiometer
noun
A instrument that computes the absorption rate by measuring the pressure of the gas; a colorimeter for liquids.
An instrument used to measure the amount of radiation or light absorbed.
absorptiometric
absorptiometric
adj
Of or pertaining to the measurement of absorption.
absorptive
absorptive
adj
Having power, capacity, or tendency to absorb or imbibe; absorbent.
noun
Any substance that absorbs.
absorptively
absorptively
adv
In an absorptive way.
absorptiveness
absorptiveness
noun
The quality of being absorptive; absorptive power.
abstersion
abstersion
noun
(archaic) Act of wiping clean; a cleansing; a purging.
abstertion
acanthocereus
acanthomeridae
acanthopore
acanthopore
noun
(paleontology) A tubular spine in some bryozoans.
acanthopteran
acanthopteran
noun
Alternative form of acanthopterygian
acanthopteri
acanthopteri
noun
(zoology) A group of teleostean fishes having spiny fins. See Acanthopterygii.
acanthopterous
acanthopterous
adj
(zoology) Acanthopterygious
(zoology) Spiny-winged.
acanthopterygian
acanthopterygian
adj
(zoology) Similar to an acanthopterygian.
noun
(zoology) Any fish of the superorder Acanthopterygii.
acanthopterygii
acarodermatitis
acarodermatitis
noun
(pathology) inflammation of the skin caused by mites
acategorical
acategorical
adj
Not categorical; not subject to being included in a category.
acceleration
acceleration
noun
(countable) The amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).
(physics) The change of velocity with respect to time (can include deceleration or changing direction).
(uncountable) The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration.
The advancement of students at a rate that places them ahead of where they would be in the regular school curriculum.
accelerations
accelerations
noun
plural of acceleration
accelerator
accelerator
noun
(chemistry) A substance which speeds up chemical reactions.
(computing) A computer component using dedicated hardware to accelerate the processing and display of graphics.
(computing) An accelerator key.
(historical) A light van to take mails between a post office and a railway station.
(photography) A chemical that reduces development time.
(physics) A device that accelerates charged subatomic particles; a particle accelerator.
(physiology, medicine) A muscle or nerve that speeds the performance of an action.
(vehicles) A pedal causing the vehicle to accelerate when it is pressed.
A device for causing acceleration.
One who, or that which, accelerates.
acceleratorh
accelerators
accelerators
noun
plural of accelerator
acceleratory
acceleratory
adj
accelerative
accelerometer
accelerometer
noun
An instrument for measuring acceleration.
An instrument made for detecting and measuring vibrations.
accelerometers
accelerometers
noun
plural of accelerometer
accentor
accentor
noun
(music, obsolete) One who sings the leading part; the director or leader.
(obsolete) The ovenbird, Seiurus aurocapilla.
Any bird of the Eurasian genus Prunella, such as the dunnock.
accentors
accentors
noun
plural of accentor
accentuator
accentuator
noun
An agent that accentuates.
acceptor
acceptor
noun
(biochemistry) A transfer RNA molecule that can accept a specific amino acid
(chemistry) An atom or molecule which can accept an electron to form a chemical bond.
(computing theory) A kind of finite-state machine whose binary output indicates whether or not a received input was accepted.
(law, commerce) One who accepts a draft or a bill of exchange; a drawee after he has accepted.
(physics) A chemical acceptor atom forming a positive hole in a semiconductor
(physiology) A cluster of skin cells that respond to pain
One who accepts.
acceptors
acceptors
noun
plural of acceptor
accersition
accersitor
accordature
accorporate
accounter
accounter
noun
A person providing an account of events.
A person providing an accounting of expenditure or other actions.
accounters
accounters
noun
plural of accounter
accountrement
accouter
accouter
verb
(transitive) To furnish with dress or equipments, especially those for military service
accoutered
accoutered
verb
simple past tense and past participle of accouter
accoutering
accoutering
verb
present participle of accouter
accouterment
accouterment
noun
(archaic) The act of accoutering; furnishing.
(by extension) An identifying yet superficial characteristic.
(chiefly in the plural) An article of clothing or equipment, in particular when used as an accessory.
(military, chiefly in the plural) A soldier's equipment, other than weapons and uniform.
accouterments
accouterments
noun
plural of accouterment
accouters
accouters
verb
Third-person singular simple present indicative form of accouter
accoutre
accoutre
verb
(Commonwealth) Alternative form of accouter
accoutred
accoutred
adj
Provided with vital supplies for a precise aim, more specifically for the armed forces.
Supplied with essential equipments for a certain intention, particularly military.
verb
simple past tense and past participle of accoutre
accoutrement
accoutrement
noun
(Commonwealth) Alternative form of accouterment
accoutrements
accoutrements
noun
plural of accoutrement
accoutres
accoutres
verb
Third-person singular simple present indicative form of accoutre
accreditation
accreditation
noun
(education) The granting of approval to an institution of higher learning by an official review board after the school has met certain requirements.
The act of accrediting.
The giving of credentials.
accreditations
accreditations
noun
plural of accreditation
accrementition
accrementition
noun
(physiology) The process of generation by development of blastema, or fission of cells, in which the new formation is in all respect like the individual from which it proceeds.
accretion
accretion
noun
(astrophysics) The formation of planets and other bodies by collection of material through gravity.
(biology) A growing together of parts naturally separate, as of the fingers or toes.
(geology) The gradual increase of land by deposition of water-borne sediment.
(law) Gain to an heir or legatee; failure of a coheir to the same succession, or a co-legatee of the same thing, to take his share percentage.
(law) The adhering of property to something else, by which the owner of one thing becomes possessed of a right to another; generally, gain of land by the washing up of sand or sail from the sea or a river, or by a gradual recession of the water from the usual watermark.
Concretion; coherence of separate particles.
Something added externally to promote the external growth of an item.
The act of increasing by natural growth; especially the increase of organic bodies by the internal accession of parts; organic growth.
The act of increasing, or the matter added, by an accession of parts externally; an extraneous addition.
accretionary
accretionary
adj
Of, pertaining to, or in the form of an accretion
accretions
accretions
noun
plural of accretion
accroachment
accroachment
noun
(obsolete) An encroachment; usurpation.
aceanthrenequinone
acentrous
acentrous
adj
(ichthyology) lacking vertebral centra
aceratosis
acerbityacerose
acervation
acervation
noun
(obsolete, rare) A heaping up; accumulation
acetabuliferous
acetabuliferous
adj
Furnished with fleshy cups for adhering to bodies, as cuttlefish, etc.
acetabuliform
acetabuliform
adj
(botany) Shaped like a saucer or shallow cup.
acetarious
acetarious
adj
(archaic) Used in salads or as salad
acetarsone
acetarsone
noun
Synonym of acetarsol
acetbromamide
acetoarsenite
acetoarsenite
noun
(chemistry) Any mixed salt containing both acetate and arsenite anions
acetobacter
acetobacter
noun
Any of the genus Acetobacter of acetic acid bacteria characterized by the ability to convert ethanol to acetic acid in the presence of oxygen, and used in the commercial production of vinegar.
acetobromanilide
acetochloral
acetometer
acetometer
noun
Alternative form of acetimeter
acetometric
acetometric
adj
Relating to acetometry.
acetometrical
acetometrically
acetometry
acetometry
noun
The measurement of the concentration of acetic acid in vinegar
acetomorphin
acetomorphine
acetomorphine
noun
heroin
acetonitrile
acetonitrile
noun
(organic chemistry) The simplest organic cyanide or nitrile, CH₃CN, formally derived from acetic acid
acetonuria
acetonuria
noun
(pathology) A form of ketonuria characterized by the presence of acetone in the urine
acetonurometer
acetopiperone
acetopyrin
acetopyrine
acetopyrine
noun
(medicine) An acetylsalicylate of antipyrine
acetostearin
acetoveratrone
acetoveratrone
noun
(organic chemistry) The ketone 3,4-dimethoxy-acetophenone derived from veratrole
acetylator
acetylator
noun
(biochemistry) A human being or other organism that can metabolize certain drugs by acetylating them (to a greater or lesser extent).
acetylcarbazole
acetylcholinesterase
acetylcholinesterase
noun
(biochemistry) An enzyme that catalyzes the hydrolysis of the neurotransmitter acetylcholine into choline and acetic acid.
acetylfluoride
acetylmethylcarbinol
acetylmethylcarbinol
noun
(organic chemistry) acetoin
acetylperoxide
acetylrosaniline
acetyltropeine
acherontic
acherontic
adj
Alternative form of Acherontic
acherontical
achondrite
achondrite
noun
(astronomy, geology) Any stony meteorite that contains no chondrules
achondrites
achondrites
noun
plural of achondrite
achordate
achordate
adj
(biology) Not having a proto-spinal chord at any stage of development.
achroacyte
achroacyte
noun
(cytology) Any colourless cell (especially a lymphocyte)