(analytical chemistry) The constant a in the Beer's law relation A = abc, where A is the absorbance, b the path length, and c the concentration of solution. Also known as absorptive power. Formerly known as absorbency index; absorption constant; extinction coefficient.
(thermodynamics) The fraction of radiation absorbed by a surface to the total radiation incident on the surface.
The quality of being absorptive; absorptiveness.
abstemiously
abstemiously
adv
Marked by abstinence or restraint, especially in relation to food or drink.
abyssobenthonic
abyssolith
abyssolith
noun
(geology) A mass of igneous rock deep in the crust with no known bottom; a large batholith.
acanthology
acanthology
noun
The study of spined things, in particular sea urchins, and the resultant impact on taxonomy.
acantholysis
acantholysis
noun
(medicine) The loss of intercellular connections, resulting in loss of cohesion between keratinocytes, seen in diseases such as pemphigus vulgaris.
acanthopterygian
acanthopterygian
adj
(zoology) Similar to an acanthopterygian.
noun
(zoology) Any fish of the superorder Acanthopterygii.
acanthopterygii
acceleratory
acceleratory
adj
accelerative
acclamatory
acclamatory
adj
Pertaining to, or expressing approval by, acclamation.
accommodately
accommodately
adv
(rare) suitably; fitly
accommodatingly
accommodatingly
adv
In an accommodating manner.
accommodatively
accommodatively
adv
In a accommodative manner; accommodatingly.
accompanyist
accompanyist
noun
Alternative spelling of accompanist
accomplicity
accomplicity
noun
(rare) The act or state of being an accomplice.
accordantly
accordantly
adv
In accordance or agreement; agreeably; conformably.
accountability
accountability
noun
(military) The obligation imposed by law or regulation on an officer or other person for keeping accurate record of property, documents, or funds. The person having this obligation may or may not have actual possession of the property, documents, or funds. Accountability is concerned primarily with records, while responsibility is concerned primarily with custody, care, and safekeeping.
An open determination of one's responsibility for something and imposition of consequences.
Good-faith acceptance of one's responsibility for something and of its consequences.
The state of being accountable; liability to be called on to render an account or give an explanation; liability to be held responsible or answerable for something.
accountably
accountably
adv
In an accountable manner.
accountancy
accountancy
noun
(countable, accounting) A company or organisation that performs such a function.
(uncountable, Britain, New Zealand, often Philippines, accounting) The function of compiling and providing financial information primarily by reports referred to as financial statements, including bookkeeping, systems design, analysis and interpretation of accounting information.
accretionary
accretionary
adj
Of, pertaining to, or in the form of an accretion
accusatorially
accusatorially
adv
By way of accusation; in an accusatorial manner.
accusatory
accusatory
adj
Pertaining to, or containing, an accusation.
accustomedly
accustomedly
adv
In an accustomed manner.
acephalocyst
acephalocyst
noun
(zoology) A larval entozoön in the form of a subglobular or oval vesicle, or hydatid, filled with fluid, sometimes found in the tissues of man and the lower animals; -- so called from the absence of a head or visible organs on the vesicle. These cysts are the immature stages of certain tapeworms. Also applied to similar cysts of different origin.
acerbityacerose
acetolysis
acetolysis
noun
(organic chemistry) The breakdown of an organic compound using either acetic acid or acetic anhydride
acetolytic
acetolytic
adj
Relating to acetolysis.
acetometrically
acetometry
acetometry
noun
The measurement of the concentration of acetic acid in vinegar
acetonyl
acetonyl
noun
(organic chemistry) The univalent radical CH₃-CO-CH₂- formally derived from acetone
acetonylacetone
acetonylacetone
noun
(organic chemistry) The aliphatic diketone 2,5-hexanedione
acetonylidene
acetonylidene
noun
(organic chemistry) The divalent radical CH₃-CO-CH= formally derived from acetone
acetopyrin
acetopyrine
acetopyrine
noun
(medicine) An acetylsalicylate of antipyrine
acetosalicylic
acetosity
acetosity
noun
The quality of being acetous; sourness.
acetoxyl
acetoxyl
noun
(organic chemistry) The acetate group, CH₃COO-, when viewed as a substituent
acetoxyls
acetoxyls
noun
plural of acetoxyl
acetoxyphthalide
acetylacetonates
acetylacetonates
noun
plural of acetylacetonate
acetylacetone
acetylacetone
noun
(organic chemistry) The diketone CH₃COCH₂COCH₃ used as a solvent and as a coordination ligand
acetylaminobenzene
acetylation
acetylation
noun
(organic chemistry) The reaction of a substance with acetic acid or one of its derivatives; the introduction of one or more acetyl groups into a substance.
acetylations
acetylations
noun
plural of acetylation
acetylator
acetylator
noun
(biochemistry) A human being or other organism that can metabolize certain drugs by acetylating them (to a greater or lesser extent).
acetylbenzoate
acetylbenzoic
acetylcarbazole
acetylcellulose
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.
acetylenation
acetylenation
noun
(organic chemistry) Conversion into, or reaction with an acetylene
acetylenogen
acetylfluoride
acetyliodide
acetylization
acetylization
noun
Synonym of acetylation
acetylmethylcarbinol
acetylmethylcarbinol
noun
(organic chemistry) acetoin
acetylperoxide
acetylphenol
acetylrosaniline
acetylsalol
acetylthymol
acetyltropeine
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
acidometry
acidometry
noun
Alternative form of acidimetry
acidoproteolytic
acidoproteolytic
adj
Relating to acidoproteolytes
acidosteophyte
acidosteophyte
noun
(medicine) A sharp or needle-shaped osteophyte.
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.
acritochromacy
acritochromacy
noun
(archaic, medicine) Color blindness, achromatopsia.
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.
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.
actinautography
actinautography
noun
(obsolete, photography) The production of an actinautographic image
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.