(organic chemistry) The aromatic ketone phenyl methyl ketone, used in the manufacture of very many organic compounds
acetothienone
acetothienone
noun
(organic chemistry) The ketone 1-thiophen-2-ylethanone
acetoxyphthalide
acetphenetid
acetphenetidin
acetylcholine
acetylcholine
noun
(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.
acetylhydrazine
acetylhydrazine
noun
(organic chemistry) The acylhydrazine of acetic acid CH₃CO-NH-NH₂
acetylmethylcarbinol
acetylmethylcarbinol
noun
(organic chemistry) acetoin
acetylphenol
acetylphenylhydrazine
acetylthymol
achaeta
achaetous
achaetous
adj
(zoology) Without setae
achamoth
acharnement
acharnement
noun
(obsolete) Savage fierceness; ferocity.
achate
achate
noun
(obsolete) An agate.
achates
achates
noun
plural of achate
achatina
achatinella
achatinella
noun
Oahu tree snail (Achatinella spp.).
achatinidae
achatour
achatour
noun
(historical) A purveyor of provisions; a provedore. [14th–18th c.]
acheat
acheft
acherontic
acherontic
adj
Alternative form of Acherontic
acherontical
achete
achetidae
achiest
achiest
adj
superlative form of achy: most achy
achievability
achievability
noun
The state or condition of being achievable.
achievement
achievement
noun
(grammar, semantics) The lexical aspect (aktionsart) of verbs or predicates that change in an instant.
(heraldry) An escutcheon or ensign armorial; a full display or depiction of all the heraldic components to which the bearer of a coat of arms is entitled; (now especially) a funeral shield: the hatchment.
(sociology) The successful completion of a socially defined goal or task, highlighting individual or group accomplishment.
(video games) An award for completing a particular task or meeting an objective in a video game.
A great or heroic deed or feat; something accomplished by valor or boldness.
The act of achieving or performing; a successful performance; accomplishment.
achievements
achievements
noun
plural of achievement
achillobursitis
achillobursitis
noun
(pathology) inflammation of a bursa near the Achilles tendon
achiote
achiote
noun
A tropical American evergreen shrub, Bixa orellana; the lipstick tree.
An orange-red dye obtained from this seed.
The seed of this tree used as a colouring or in Latin American cooking.
achiotes
achiotes
noun
plural of achiote
achirite
achirite
noun
dioptase
achitophel
achlamydate
achlamydate
adj
(zoology) Not possessing a mantle.
achmetha
achondrite
achondrite
noun
(astronomy, geology) Any stony meteorite that contains no chondrules
achondrites
achondrites
noun
plural of achondrite
achondritic
achondritic
adj
(geology) Of or pertaining to achondrites, a type of stony meteorite.
achondroplastic
achondroplastic
adj
(teratology) Of, related to, or suffering from achondroplasia.
achordata
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)
achroanthes
achrodextrin
achrodextrin
noun
(biochemistry, cytology) A form of dextrin that is not colourable by iodine
achrodextrinase
achroiocythaemia
achroiocythemia
achroite
achroite
noun
(mineralogy) A colourless form of tourmaline
achromacyte
achromacyte
noun
(cytology) Any cell that lacks its normal pigmentation (especially an erythrocyte that has ruptured and lost its haemoglobin)
achromat
achromat
noun
(optics) A lens that imparts little color; a lens that is achromatic.
achromate
achromatiaceae
achromatic
achromatic
adj
(biology) Uncolored; not absorbing color from a fluid; -- said of tissue
(music) Having only the diatonic notes of the scale; not modified by accidentals.
(optics) Free from color; transmitting light without color-related distortion.
Being achromatic in subject
Containing components such as achromatic lenses and prisms, designed to prevent color-related distortion.
achromatically
achromatically
adv
In an achromatic manner.
achromaticity
achromaticity
noun
(optics) The state or quality of being achromatic.
achromatin
achromatin
noun
(biology) Tissue that is not stained by fluid dyes.
achromatinic
achromatinic
adj
(cytology, of a cell nucleus) Lacking the ability to be coloured by a stain.
achromatisation
achromatise
achromatise
verb
Non-Oxford British English standard spelling of achromatize.
achromatised
achromatised
verb
simple past tense and past participle of achromatise
achromatising
achromatising
verb
present participle of achromatise
achromatism
achromatism
noun
(optics) The state or quality of being achromatic; achromaticity.
Achromatopia.
The state of being free of colors, not emitting or separating into colors.
achromatisms
achromatisms
noun
plural of achromatism
achromatium
achromatizable
achromatization
achromatization
noun
The act or process of achromatizing.
achromatize
achromatize
verb
(transitive) To deprive of colour; to make achromatic.
(transitive) To remove chromatic aberration from an optical system
achromatized
achromatized
verb
simple past tense and past participle of achromatize
achromatizes
achromatizes
verb
Third-person singular simple present indicative form of achromatize
achromatizing
achromatizing
verb
present participle of achromatize
achromatocyte
achromatocyte
noun
achromacyte
achromatolysis
achromatolysis
noun
(cytology) dissolution of achromatin
achromatope
achromatope
noun
A person who has achromatopia.
achromatophil
achromatophil
noun
(cytology) A cell (or tissue) that is not readily coloured by stains
achromatophile
achromatophile
adj
Being or relating to an achromatophil.
achromatophilia
achromatophilia
noun
(cytology) The condition of being an achromatophil
achromatophilic
achromatopia
achromatopia
noun
defective ability to see colours
achromatopsia
achromatopsia
noun
achromatopia
achromatopsy
achromatopsy
noun
color blindness; inability to distinguish colors; daltonism, achromatopia
achromatosis
achromatosis
noun
(pathology) achromia, albinism
achromatous
achromatous
adj
Lacking normal colour; colourless
achromats
achromats
noun
plural of achromat
achromaturia
achromaturia
noun
(pathology) The lack of pigments (especially bile pigments) in the urine
achromobacter
achromobacterieae
achromotrichia
achromotrichia
noun
The absence (or loss) of pigmentation in the hair.
achroodextrin
achroodextrin
noun
Alternative form of achrodextrin
achroodextrinase
achtehalber
achtel
achtel
noun
(historical) An old German measure of capacity.
achtelthaler
achter
achterveld
achuete
achyranthes
achyranthes
noun
plural of achyranthe
acidanthera
acidanthera
noun
Any of the gladioli previously placed in the genus Acidanthera.
acidosteophyte
acidosteophyte
noun
(medicine) A sharp or needle-shaped osteophyte.
ackworth
acmaesthesia
acmesthesia
acmesthesia
noun
(pathology) The sensitivity of the skin to a sharp point (such as a pinprick)
acocanthera
acocantherin
acocantherin
noun
Alternative form of acokantherin
acoenaesthesia
acoluthic
acoluthic
adj
Pertaining to a residual sense impression immediately following a stimulus, as with an afterimage
acolyth
acolyth
noun
Obsolete form of acolyte.
acolythate
acolythate
noun
The office of an acolyte
acousticophobia
acousticophobia
noun
Fear of noise.
acquaintanceship
acquaintanceship
noun
(countable) A relationship as acquaintances.
(uncountable) The state of being acquainted.
acquaintanceships
acquaintanceships
noun
plural of acquaintanceship
acritochromacy
acritochromacy
noun
(archaic, medicine) Color blindness, achromatopsia.
acroaesthesia
acroaesthesia
noun
(pathology) hyperaesthesia, especially that affects the hands or feet
acroanesthesia
acroanesthesia
noun
Alternative form of acroanaesthesia
acroarthritis
acroarthritis
noun
(pathology) arthritis in the joints of the hands or feet
acrobatholithic
acrobatholithic
adj
Relating to the upward-projecting dome of a batholith
acrocorinth
acroesthesia
acroesthesia
noun
Alternative spelling of acroaesthesia
acrolith
acrolith
noun
(historical) An ancient Greek wooden statue furnished with a rupestral head and limbs.
acrolithan
acrolithan
Adjective
Relating to, or like, an acrolith.
acrolithic
acrolithic
adj
Relating to, or like, an acrolith.
acroliths
acroliths
noun
plural of acrolith
acromiothoracic
acromiothoracic
adj
thoracoacromial
acroparesthesia
acroparesthesia
noun
(medicine) severe pain in the extremities
acropathology
acropathology
noun
(pathology, rare) The study of diseases of the limbs or the extremities.
acropathy
acropathy
noun
Any disease specific to the extremities.
acrophonetic
acrophonetic
adj
Of or pertaining to acrophony.
acrostichal
acrostichal
adj
(entomology, of bristles) Situated on the mesothorax of some dipteran flies
acrosticheae
acrostichic
acrostichic
adj
Being or relating to an acrostic.
acrostichoid
acrostichoid
adj
(botany, of a fern) Whose sori densely cover the underside of the frond like a felt, without visible gaps between them.
acrostichum
acrothoracica
acrotrophic
acrotrophic
adj
(biology, of an insect) Having nutritive cells at the top of the follicular tube
acrotrophoneurosis
acth
actinautographic
actinautographic
adj
(obsolete, photography) That produces a developable impression on light-sensitive material without contact
actinautography
actinautography
noun
(obsolete, photography) The production of an actinautographic image
actinenchyma
actiniochrome
actiniochrome
noun
A red to violet pigment present in some Actinozoa
actiniohematin
actiniohematin
noun
A pigment (mixture of cytochromes) present in the sea anemone Actinia equina
actiniomorpha
actinobranch
actinobranch
noun
(biology) An organ, in some anthozoans, that functions as a gill
actinobranchia
actinobranchia
noun
Alternative form of actinobranch
actinochemical
actinochemical
adj
Relating to actinochemistry.
actinochemistry
actinochemistry
noun
The science of chemistry and actinism.
actinograph
actinograph
noun
A recording actinometer.
actinographic
actinography
actinography
noun
measurement with an actinograph
actinomorphic
actinomorphic
adj
(botany, of a flower) Having its petals arranged in a radially symmetric fashion.
