(biochemistry) A neurotransmitter in humans and other animals. It is an ester of acetic acid and choline with chemical formula CH₃COOCH₂CH₂N⁺(CH₃)₃.
acetylcholinesterase
acetylcholinesterase
noun
(biochemistry) An enzyme that catalyzes the hydrolysis of the neurotransmitter acetylcholine into choline and acetic acid.
acetylcholinic
acetylcholinic
adj
(biochemistry) Of or relating to acetylcholine.
acetylcyanide
acetylenation
acetylenation
noun
(organic chemistry) Conversion into, or reaction with an acetylene
acetylene
acetylene
noun
(organic chemistry, countable) Any organic compound having one or more carbon–carbon triple bonds; an alkyne.
(organic chemistry, uncountable) Ethyne; the simplest alkyne, a hydrocarbon of formula HC≡CH. It is a colourless, odorless, extremely flammable, explosive gas, formerly used as an illuminating gas, but now used in welding and metallurgy.
A lamp powered by acetylene, particularly a motor vehicle headlight.
acetylenediurein
acetylenes
acetylenes
noun
plural of acetylene
acetylenic
acetylenic
adj
(organic chemistry) Of or pertaining to acetylene or its derivatives; having a carbon-to-carbon triple bond
acetylenogen
acetylenyl
acetylenyl
noun
(organic chemistry) Any radical derived from an acetylene, but especially ethynyl
acetylfluoride
acetylglycin
acetylglycine
acetylglycine
noun
(organic chemistry) The N-acetyl derivative of glycine
acetylhydrazine
acetylhydrazine
noun
(organic chemistry) The acylhydrazine of acetic acid CH₃CO-NH-NH₂
acetylic
acetylic
adj
(organic chemistry) Of or pertaining to acetyl.
acetylid
acetylide
acetylide
noun
(organic chemistry) Any organic compound derived from acetylene or a terminal acetylene by replacing a hydrogen atom with a metal.
acetyliodide
acetylizable
acetylizable
adj
Able to be acetylized.
acetylization
acetylization
noun
Synonym of acetylation
acetylize
acetylize
verb
Synonym of acetylate
acetylized
acetylized
verb
simple past tense and past participle of acetylize
acetylizer
acetylizer
noun
Synonym of acetylator
acetylizing
acetylizing
verb
present participle of acetylize
acetylmethylcarbinol
acetylmethylcarbinol
noun
(organic chemistry) acetoin
acetylperoxide
acetylphenol
acetylphenylhydrazine
acetylrosaniline
acetyls
acetyls
noun
plural of acetyl
acetylsalicylate
acetylsalicylate
noun
(organic chemistry) the acetyl derivative of salicylate; any salt or ester of acetylsalicylic acid
acetylsalicylic
acetylsalicylic
adj
(organic chemistry) Describing any derivative of salicylic acid in which the phenolic hydroxyl has been acetylated.
acetylsalol
acetyltannin
acetyltannin
noun
(organic chemistry) Synonym of acetyltannic acid
acetylthymol
acetyltropeine
acetylurea
achievability
achievability
noun
The state or condition of being achievable.
achlamydate
achlamydate
adj
(zoology) Not possessing a mantle.
achroacyte
achroacyte
noun
(cytology) Any colourless cell (especially a lymphocyte)
achroiocythaemia
achroiocythemia
achromacyte
achromacyte
noun
(cytology) Any cell that lacks its normal pigmentation (especially an erythrocyte that has ruptured and lost its haemoglobin)
achromatically
achromatically
adv
In an achromatic manner.
achromaticity
achromaticity
noun
(optics) The state or quality of being achromatic.
achromatocyte
achromatocyte
noun
achromacyte
achromatolysis
achromatolysis
noun
(cytology) dissolution of achromatin
achromatopsy
achromatopsy
noun
color blindness; inability to distinguish colors; daltonism, achromatopia
achyranthes
achyranthes
noun
plural of achyranthe
acicularity
acicularity
noun
Quality or degree of being acicular.
acidimetrically
acidimetrically
adv
(chemistry) By means of, or in terms of, acidimetry.
acidimetry
acidimetry
noun
(chemistry) The measurement of the strength of acids, especially by a chemical process based on the law of chemical combinations, or the fact that, to produce a complete reaction, a certain definite weight of reagent is required.
acidity
acidity
noun
(figurative) A caustic, sour, biting, or bitter quality.
(pathology) Excessive acid quality, as in gastric secretions.
Sourness; tartness; sharpness to the taste.
The quality or state of being acid.
acidometry
acidometry
noun
Alternative form of acidimetry
acidoproteolytic
acidoproteolytic
adj
Relating to acidoproteolytes
acidosteophyte
acidosteophyte
noun
(medicine) A sharp or needle-shaped osteophyte.
acinacity
acolyctine
acolyctine
noun
(organic chemistry) An organic base, in the form of a white powder, obtained from Aconitum lycoctonum.
acolyte
acolyte
noun
(Christianity) An altar server.
(Christianity) One who has received the highest of the four minor orders in the Catholic Church, being ordained to carry the wine, water and lights at Mass.
An attendant, assistant or follower.
acolytes
acolytes
noun
plural of acolyte
acolyth
acolyth
noun
Obsolete form of acolyte.
acolythate
acolythate
noun
The office of an acolyte
acolytus
acotyledon
acotyledon
noun
(botany) A plant that has no cotyledons, as the dodder and all flowerless plants.
acotyledonous
acotyledonous
adj
Having no seed lobes, as the dodder; also applied to plants which have no true seeds, as ferns, mosses, etc.
acoumetry
acoumetry
noun
The measuring of the power or extent of hearing.
acoustically
acoustically
adv
(domain) From the perspective of acoustics.
(manner) In an acoustic manner, or using an acoustic musical instrument.
acquaintancy
acquaintancy
noun
acquaintanceship
acquiescently
acquiescently
adv
In an acquiescent manner.
acquirability
acquirability
noun
(rare) The quality of being acquirable; attainableness.
acquisitively
acquisitively
adv
In an acquisitive manner; for the purpose of acquisition.
acridity
acridity
noun
(figurative) Bitterness in speech or behaviour; causticness.
An acrid taste or smell.
Bitterness or acerbity.
acritochromacy
acritochromacy
noun
(archaic, medicine) Color blindness, achromatopsia.
acrity
acrity
noun
(obsolete) sharpness; keenness
acrobatically
acrobatically
adv
In an acrobatic manner.
acrobystitis
acrocyst
acrocyst
noun
A chitinous cyst of the gonophore at the top of the gonotheca in some hydroids
acrodactyla
acrodactylum
acrodactylum
noun
The upper surface of a toe
acromyotonia
acromyotonia
noun
(pathology) myotonia of the limbs
acromyotonus
acromyotonus
noun
Synonym of acromyotonia
acronycta
acronyctous
acronyctous
adj
(astronomy) acronycal
acropathology
acropathology
noun
(pathology, rare) The study of diseases of the limbs or the extremities.
acropathy
acropathy
noun
Any disease specific to the extremities.
acropetally
acropetally
adv
In an acropetal manner.
acrostically
acrostically
adv
In the manner of an acrostic.
acrylate
acrylate
noun
(organic chemistry) Any salt or ester of acrylic acid.
acrylates
acrylates
noun
plural of acrylate
acrylonitrile
acrylonitrile
noun
(organic chemistry) A toxic colourless liquid organic compound, CH₂=CH.CN, synthesized from propylene and ammonia; used as a monomer in the production of acrylic resins and synthetic rubber.
actability
actability
noun
The condition of being actable
actify
actify
verb
Synonym of activate
actinally
actinally
adv
In an actinal manner.
actinautography
actinautography
noun
(obsolete, photography) The production of an actinautographic image
actinenchyma
actinically
actinically
adv
In an actinic manner.
actinochemistry
actinochemistry
noun
The science of chemistry and actinism.
actinoelectrically
actinoelectricity
actinoelectricity
noun
photoconductivity
actinography
actinography
noun
measurement with an actinograph
actinology
actinology
noun
(sciences) The study of the effect of light on chemicals.
actinometricy
actinometry
actinometry
noun
the measurement of the chemical or actinic energy of light
the measurement of the heating power of electromagnetic radiation, especially that of solar radiation
actinomorphy
actinomorphy
noun
The condition of being actinomorphic.
actinomyces
actinomyces
noun
A bacterium (species) of the genus Actinomyces.
actinomycese
actinomycesous
actinomycestal
actinomycetaceae
actinomycetal
actinomycetal
adj
Of or relating to the Actinomycetales, an order of Actinobacteria.
actinomycetales
actinomycete
actinomycete
noun
Any of various filamentous or rod-shaped bacteria, of the order Actinomycetales, that resemble fungi. Some actinomycetes are pathogens and some are sources of antibiotics.
actinomycetous
actinomycetous
adj
Of or relating to actinomycetes.
actinomycin
actinomycin
noun
(biochemistry, pharmacology) Any of a class of toxic polypeptide antibiotics found in soil bacteria of genus Streptomyces.
actinomycins
actinomycins
noun
plural of actinomycin
actinomycoma
actinomycoma
noun
The granulomatous lesion characteristic of actinomycosis
actinomycosis
actinomycosis
noun
(pathology) An infectious bacterial disease of cattle and swine, sometimes transmitted to man, characterized by the formation of painful abscesses in the mouth, lungs, or gastrointestinal tract, caused by Actinomyces israelii, Actinomyces gerencseriae, and Propionibacterium propionicum.
actinomycosistic
actinomycotic
actinomycotic
adj
Of or pertaining to actinomycosis.
actinomyxidia
actinomyxidiida
actinophryan
actinophrys
actinopterygian
actinopterygian
adj
Of the nature of fish of the class Actinopterygii.
noun
(zoology) Any of the ray-finned fish of the taxonomic class Actinopterygii.
actinopterygii
actinopterygious
actinoscopy
actinoscopy
noun
(medicine, archaic) Radiology; examination by means of an X-ray machine.
actinostereoscopy
actinotherapy
actinotherapy
noun
(medicine) The treatment of disease, especially skin disease, by exposure to ultraviolet light; radiotherapy.
actionability
actionability
noun
The characteristic of being actionable.
actionably
actionably
adv
In an actionable manner.
actionary
actionary
noun
(business, obsolete) A shareholder in a joint-stock company.
actipylea
actively
actively
adv
(grammar) In the active form; not passive.
In an active manner.
activity
activity
noun
(countable) Something done as an action or a movement.
(countable) Something done for pleasure or entertainment, especially one involving movement or an excursion.
(grammar, semantics) The lexical aspect (aktionsart) of verbs or predicates that change over time and have no natural end point.
(physics) The number of radioactive decays per unit time. Unit for it: becquerel or curie
(uncountable) The state or quality of being active; activeness.
The propery of substances to react with other substances
actomyosin
actomyosin
noun
(biochemistry) A protein complex composed of actin and myosin, found in muscle fibres.
actomyosins
actomyosins
noun
plural of actomyosin
actory
actory
adj
Like, characteristic, or typical of an actor
actressy
actressy
adj
Characteristic of an actress
Histrionic or theatrical
actuality
actuality
noun
(historical, film) A short early motion picture.
(television) Live reporting on current affairs.
An instance or quality of being actual or factual; fact.
The state of existing; existence.
actually
actually
adv
(modal) In act or in fact; really; in truth; positively.
(obsolete) Actively.
(obsolete) Currently; at the time.
actuarially
actuarially
adv
By actuarial principles.
From an actuarial perspective.
In a manner performed by an actuary.
actuary
actuary
noun
(dated) Registrar, clerk. [16th-19th c.]
A professional who calculates financial values associated with uncertain events subject to risk, such as insurance premiums or pension contributions.
actuaryship
actuaryship
noun
The role or status of actuary.
acuity
acuity
noun
Sharpness or acuteness, as of a needle, wit, etc.
The ability to think, see, or hear clearly.
acutely
acutely
adv
In an acute manner
acxoyatl
acyetic
acylate
acylate
verb
(transitive, organic chemistry) To add one or more acyl groups to a compound.
acylated
acylated
adj
(organic chemistry) Having an acyl functional group; modified by addition of an acyl group
verb
simple past tense and past participle of acylate
acylates
acylates
verb
Third-person singular simple present indicative form of acylate