(physics) A logarithmic measure of the amount of light that is absorbed when passing through a substance; the capacity of a substance to absorb light of a given wavelength; optical density.
absorbances
absorbances
noun
plural of absorbance
absorbancies
absorbancies
noun
plural of absorbancy
absorbefacient
absorbefacient
adj
(medicine) Inducing or increasing absorption (of a drug).
noun
(medicine) Any such medicine that induces absorption.
absorbencies
absorbencies
noun
plural of absorbency
absorbency
absorbency
noun
(obsolete) The action of absorbing.
(physics) The ratio of the absorbance or optical density of a substance to that of a similar body of pure solvent.
The quality of being 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
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
accelerando
accelerando
adv
(music) With a gradual increase in speed.
noun
(by extension) Accelerating or exponential advancement or development (of a thing).
(music) A tempo mark directing that a passage is to be played at an increasing speed.
accelerandos
accelerandos
noun
plural of accelerando
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
accensor
accensor
noun
(Roman Catholicism) One of the functionaries who light and trim the tapers.
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.
accersition
accessioner
accessioner
noun
One who accessions.
accessoriness
accessoriness
noun
The state of being accessory, or connected subordinately.
accessorizing
accessorizing
verb
present participle of accessorize
accompanier
accompanier
noun
Someone or something that accompanies.
accordance
accordance
noun
Agreement; harmony; conformity; compliance.
The act of granting something.
accordances
accordances
noun
plural of accordance
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
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
accoutrement
accoutrement
noun
(Commonwealth) Alternative form of accouterment
accoutrements
accoutrements
noun
plural of accoutrement
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.
accrescendo
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
acensuador
acentrous
acentrous
adj
(ichthyology) lacking vertebral centra
acervation
acervation
noun
(obsolete, rare) A heaping up; accumulation
acetarsone
acetarsone
noun
Synonym of acetarsol
acetoarsenite
acetoarsenite
noun
(chemistry) Any mixed salt containing both acetate and arsenite anions
acetobromanilide
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
acetylcholinesterase
acetylcholinesterase
noun
(biochemistry) An enzyme that catalyzes the hydrolysis of the neurotransmitter acetylcholine into choline and acetic acid.
acetylmethylcarbinol
acetylmethylcarbinol
noun
(organic chemistry) acetoin
acetylrosaniline
acetyltropeine
achaenocarp
achaenocarp
noun
Any dry indehiscent fruit.
achenocarp
acheron
acheronian
acheronian
Adjective
Of or pertaining to Acheron.
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
achroanthes
achrodextrin
achrodextrin
noun
(biochemistry, cytology) A form of dextrin that is not colourable by iodine
achrodextrinase
achroodextrin
achroodextrin
noun
Alternative form of achrodextrin
achroodextrinase
acieration
acieration
noun
(rare) The conversion of iron into steel.
acinetiform
acinetiform
adj
(zoology) Resembling the Acinetae.
acipenseroid
acipenseroid
noun
Synonym of chondrostean
acipenseroidei
acknowledger
acknowledger
noun
One who acknowledges.
acknowledgers
acknowledgers
noun
plural of acknowledger
acneform
acneform
adj
(pathology, especially of a rash) Resembling acne
acneiform
acneiform
adj
(pathology) Alternative form of acneform
acocanthera
acocantherin
acocantherin
noun
Alternative form of acokantherin
aconuresis
aconuresis
noun
(pathology) urinary incontinence (inability to control urination)
acopyrine
acorned
acorned
adj
(rare) Fed or filled with acorns.
Furnished or loaded with acorns
acounter
acridone
acridone
noun
(organic chemistry) An tricyclic heterocyclic ketone derived from acridine; any derivative of this compound
acrimonies
acrimonies
noun
plural of acrimony
acrimoniousness
acrimoniousness
noun
The quality of being acrimonious.
acrindoline
acroanesthesia
acroanesthesia
noun
Alternative form of acroanaesthesia
acrocentric
acrocentric
adj
(genetics) (of a chromosome) Having the centromere very near to one end, and thus having a long arm, and a very short arm.
noun
A chromosome that has the centromere very near to one end, and thus has a long arm, and a very short arm.
acrocentrics
acrocentrics
noun
plural of acrocentric
acroceraunian
acroceraunian
Adjective
Of or relating to the high mountain range of "thunder-smitten" peaks (now Kimara), between Albania and Macedonia.
acrochordinae
acrocontracture
acrocontracture
noun
(pathology) contracture of the joints of the hands or feet
acrogen
acrogen
noun
(biology) any flowerless plant whose growth takes place at the tip of the main stem, especially the cryptogam ferns
acrogenic
acrogenic
adj
Alternative form of acrogenous
acrogenous
acrogenous
adj
(botany) Increasing by growth from the extremity.
acrogenously
acrogenously
adv
In an acrogenous manner.
acrogens
acrogens
noun
plural of acrogen
acrogynae
acrolein
acrolein
noun
(organic chemistry) A pungent, acrid, poisonous liquid aldehyde, CH₂=CH-CH=O, made by the destructive distillation of glycerol.
acroleins
acroleins
noun
plural of acrolein
acromiosternal
acroneurosis
acronymize
acronymize
verb
(transitive) To turn a phrase into an acronym.
acronymized
acronymized
verb
simple past tense and past participle of acronymize
acrophonetic
acrophonetic
adj
Of or pertaining to acrophony.
acrophonies
acrophonies
noun
plural of acrophony
acroterion
acroterion
noun
Alternative form of acroterium
acrotrophoneurosis
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.
actiniferous
actiniferous
adj
Containing or producing actinium
actiniochrome
actiniochrome
noun
A red to violet pigment present in some Actinozoa
actinochemistry
actinochemistry
noun
The science of chemistry and actinism.
actinocrinidae
actinocrinite
actinocrinite
noun
A crinoid of the genus Actinocrinus present only as fossils
actinodermatitis
actinodermatitis
noun
actinic dermatitis
actinodielectric
actinodrome
actinodrome
adj
Alternative form of actinodromous
actinoelectric
actinoelectric
adj
(physics) Synonym of photoconductive
actinoelectrically
actinoelectricity
actinoelectricity
noun
photoconductivity
actinomere
actinomere
noun
(zoology) One of the radial segments making up the body of one of the Coelenterata or similar organism
actinomeric
actinomeric
adj
Relating to actinomeres
actinometer
actinometer
noun
(physics) A device used to measure the heating power of electromagnetic radiation, especially that of solar radiation.
actinometers
actinometers
noun
plural of actinometer
actinometric
actinometric
adj
Measured using an actinometer
Of or pertaining to actinometry
actinometrical
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