(medicine) A birth defect in which the head is absent
acephalus
acephalus
noun
(medicine, countable) A fetus affected by acephaly.
(medicine, uncountable) The condition of acephaly.
aceraceae
acerbated
acerbated
verb
simple past tense and past participle of acerbate
acerbates
acerbates
verb
Third-person singular simple present indicative form of acerbate
acervatim
acervulus
acervulus
noun
Synonym of corpora arenacea (calcified concretions near the pineal gland)
acescence
acescence
noun
The quality of being acescent; the process of acetous fermentation; a moderate degree of sourness.
acescency
acescency
noun
Synonym of acescence
acescents
acescents
noun
plural of acescent
acesodyne
acetabula
acetabula
noun
plural of acetabulum
acetaldol
acetaldol
noun
(organic chemistry) The aldol 3-hydroxybutanal once used as a hypnotic and sedative
acetalize
acetalize
verb
(organic chemistry) To convert (an aldehyde) into an acetal.
acetamide
acetamide
noun
(organic chemistry) The amide of acetic acid, CH₃CONH₂.
acetamido
acetamido
noun
(organic chemistry) The univalent radical derived from acetamide
acetamids
acetamids
noun
plural of acetamid
acetanion
acetannin
acetannin
noun
(organic chemistry) An acetyl derivative of tannic acid
acetation
acetation
noun
(obsolete, organic chemistry) Synonym of acetification
acetified
acetified
verb
simple past tense and past participle of acetify
acetifier
acetifier
noun
An apparatus for hastening acetification
acetifies
acetifies
verb
Third-person singular simple present indicative form of acetify
acetonate
acetonate
noun
(organic chemistry) An enolate of acetone
verb
To treat or react with acetone
acetonize
acetonize
verb
(rare) Synonym of acetonate
acetosity
acetosity
noun
The quality of being acetous; sourness.
acetoxime
acetoxime
noun
(organic chemistry) The ketoxime of acetone
acetoxyls
acetoxyls
noun
plural of acetoxyl
acetylate
acetylate
verb
(chemistry) To react with acetic acid or one of its derivatives; to introduce one or more acetyl groups into a substance
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.
acetylide
acetylide
noun
(organic chemistry) Any organic compound derived from acetylene or a terminal acetylene by replacing a hydrogen atom with a metal.
acetylize
acetylize
verb
Synonym of acetylate
achaetous
achaetous
adj
(zoology) Without setae
achalasia
achalasia
noun
(medicine, pathology) A neuromuscular condition where a ring of muscles is unable to relax fully; usually with reference to gastrointestinal smooth muscles or to esophageal achalasia when not otherwise specified.
acheilary
acheilous
acheilous
adj
(obsolete, pathology) lipless
acheirous
acheirous
adj
Of or pertaining to acheiria (lacking one or both hands)
achenodia
achetidae
acheulean
acheulean
Adjective
Of or pertaining to a lower Paleolithic period characterized by the presence of flaked bifacial hand axes.
Noun
A lower Paleolithic period characterized by the presence of flaked bifacial hand axes.
acheulian
achievers
achievers
noun
plural of achiever
achieving
achieving
noun
Achievements, emphasizing the process of accomplishing them.
verb
present participle of achieve
achillean
achillean
Adjective
Resembling or relating to Achilles, the hero of the Iliad.
Invincible with only one small weakness (an Achilles heel), which becomes one's downfall.
Guided by emotional motives, especially rage, rather than reason.
Of or relating to a Roman-era Greek writer.
Pertaining to the Achilles tendon.
Of or relating to male homosexuals or male homosexuality, in the style of Achilles' relationship with Patroclus.
achilleas
achilleas
noun
plural of achillea
achilleid
achillein
achillize
achimenes
achimenes
noun
A Central American plant, of the genus Achimenes, having showy, trumpet-shaped flowers
acholuria
acholuria
noun
(pathology) A lack of bile pigments in the urine
acholuric
acholuric
adj
(pathology) Of or pertaining to acholuria
achordata
achordate
achordate
adj
(biology) Not having a proto-spinal chord at any stage of development.
achromate
achromats
achromats
noun
plural of achromat
achromous
achromous
adj
colorless; achromatic
achronism
achropsia
achyrodes
aciculate
aciculate
adj
Furnished with aciculae.
Marked with fine irregular streaks as if scratched by a needle.
acicular (needle-shaped)
aciculums
aciculums
noun
plural of aciculum
acidaemia
acidaemia
noun
(medicine) a medical condition marked by an abnormally high concentration of hydrogen ions in a person's blood
acidalium
acidaspis
acidemias
acidemias
noun
plural of acidemia
acidheads
acidheads
noun
plural of acidhead
acidified
acidified
verb
simple past tense and past participle of acidify
acidifier
acidifier
noun
(chemistry) A simple or compound principle, whose presence is necessary to produce acidity, as oxygen, chlorine, bromine, iodine, etc.
acidifies
acidifies
verb
Third-person singular simple present indicative form of acidify
acidities
acidities
noun
plural of acidity
acidizing
acidizing
verb
present participle of acidize
acidology
acidophil
acidophil
noun
(immunology) An eosinophil; a white blood cell responsible for combating infection by parasites in the body.
One of the endocrine acidophilic cells of the adenohypophysis, including somatotrophs and lactotrophs.
acidproof
acidproof
adj
Resistant to the corrosive effects of acid.
acidulant
acidulant
noun
A food additive used to increase acidity or to give a tart taste
acidulate
acidulate
verb
(transitive) To make slightly or moderately acid; to acidify.
(transitive) To make sour in a moderate degree; to sour somewhat.
(transitive) To use an acidic catalyst, with the chemical change being emphasised over the importance of the change in pH. Used in the processing of biodiesel co-products.
acidulent
acidulent
adj
Having an acid quality; sour; acidulous.
acidulous
acidulous
adj
(figurative) Sharp; caustic.
Containing carbonic acid.
Slightly sour; sub-acid; sourish.
acidurias
acidurias
noun
plural of aciduria
acierated
acierated
verb
simple past tense and past participle of acierate
acierates
acierates
verb
Third-person singular simple present indicative form of acierate
aciliated
aciliated
adj
Alternative form of aciliate
acinacity
acinetina
aciniform
aciniform
adj
Full of small kernels like a grape.
Having the form of a cluster of grapes; clustered like grapes.
noun
A type of spinneret of a spider formed of spherical particles
acipenser
acknowing
acknowing
verb
present participle of acknow
acleidian
acleidian
adj
Alternative form of aclidian
acmaeidae
acneiform
acneiform
adj
(pathology) Alternative form of acneform
acockbill
acockbill
adv
(nautical) Hanging at the cathead, ready to let go, as an anchor.
(nautical) Topped up; having one yardarm higher than the other.
acoemetae
acoemetae
Noun
An order of fifth-century monks who, by turns, kept up a divine service day and night.
acoemetic
acoemetic
adj
Relating to, or characteristic of the Acoemetae
acoluthic
acoluthic
adj
Pertaining to a residual sense impression immediately following a stimulus, as with an afterimage
aconative
aconative
adj
Lacking conation
aconcagua
aconitine
aconitine
noun
(organic chemistry) An intensely poisonous alkaloid, extracted from aconite
aconitums
aconitums
noun
plural of aconitum
acopyrine
acoumeter
acoumeter
noun
(physics) An instrument for measuring the acuteness of the sense of hearing.
acoumetry
acoumetry
noun
The measuring of the power or extent of hearing.
acousmata
acousmata
noun
plural of acousma
acoustics
acoustics
noun
(physics) The science of sounds, teaching their nature, phenomena and laws.
plural of acoustic
acquaints
acquaints
verb
Third-person singular simple present indicative form of acquaint
acquaviva
acquereur
acquiesce
acquiesce
verb
(intransitive) To concur upon conviction; to assent to; usually, to concur, not heartily but so far as to forbear opposition.
(intransitive, with in (or sometimes with, to)) To rest satisfied, or apparently satisfied, or to rest without opposition and discontent (usually implying previous opposition or discontent); to accept or consent by silence or by omitting to object.
acquirers
acquirers
noun
plural of acquirer
acquiring
acquiring
verb
present participle and gerund of acquire
acquisita
acquisite
acquisite
adj
(obsolete) acquired
acquittal
acquittal
noun
(historical) The act of releasing someone from debt or other obligation; acquittance.
(law) A legal decision that someone is not guilty with which they have been charged, or the formal dismissal of a charge by some other legal process.
(now rare) The act of fulfilling the duties (of a given role, obligation etc.).
(rare) Avoidance of danger; deliverance.
Payment of a debt or other obligation; reparations, amends.
acquitted
acquitted
adj
Having been acquitted; having gone through a trial that resulted in something other than a guilty verdict.
verb
simple past tense and past participle of acquit
acquitter
acquitter
noun
One who acquits or releases.
acraeinae
acraniate
acraniate
adj
That lacks a cranium
noun
Any animal of the class Acrania
acrasieae
acraspeda
acraspeda
noun
(zoology) A group of acalephs that includes most of the larger jellyfish
acrestaff
acrididae
acridines
acridines
noun
plural of acridine
acridinic
acridness
acridness
noun
bitterness or acerbity
acritical
acritical
adj
Not critical
Not involving a crisis
acroamata
acroamata
noun
plural of acroama
acrobates
acrobatic
acrobatic
adj
Of or pertaining to an acrobat.
vigorously active
acroblast
acroblast
noun
(medicine) Material derived from the Golgi apparatus from which the acrosome develops during spermatogenesis.
(medicine, archaic) A type of embryonic cell forming a layer external to the mesoblast.
acrocarpi
acrocomia
acrodonts
acrodonts
noun
plural of acrodont
acrodrome
acrodrome
adj
(botany, of the veins of a leaf) That run parallel to the edges of the leaf and meet at the tip
acrodynia
acrodynia
noun
(pathology) An epidemic disease of the skin characterized by increased sensibility of the soles and palms, with pricking sensations in them and rheumatoid pains in the hands and feet.
acrogenic
acrogenic
adj
Alternative form of acrogenous
acrogynae
acroleins
acroleins
noun
plural of acrolein
acroliths
acroliths
noun
plural of acrolith
acrologic
acrologic
adj
Of or pertaining to acronyms
Of or pertaining to the naming of hieroglyphic symbols by the first phonetic sound of the picture they represent
acrologue
acromania
acromania
noun
(obsolete) mental illness (especially when accompanied by hyperactivity)
acrometer
acromimia
acromyodi
acronical
acronical
adj
(astronomy) Alternative form of acronycal
Occurring at sunset.
Occurring at the end of life.
acronycal
acronycal
adj
(astronomy) Rising at sunset and setting at sunrise, as a star.
acronycta
acronymic
acronymic
Adjective
Pertaining to the use of acronyms.
acropathy
acropathy
noun
Any disease specific to the extremities.
acropetal
acropetal
adj
(botany) That develops, matures or opens from the base towards the apex in sequence.
acrophony
acrophony
noun
The naming of letters in an alphabetic writing system using words whose initial sounds are represented by the respective letters.
acropodia
acropodia
noun
plural of acropodium
acropolis
acropolis
noun
A promontory (usually fortified with a citadel) forming the hub of many Grecian cities, and around which many were built for defensive purposes before and during the classical period; compare Acropolis.