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white crystalline substance with a bitter aftertaste; used as a fungicide or in making aspirin or dyes or perfumes 2-hydroxybenzoic acid , salicylic acid
substance that abrades or wears down abradant , abrasive , abrasive material
scouring substance abrasive
roughness of a substance that causes abrasions abrasiveness , harshness , scratchiness
material having capacity or tendency to absorb another substance absorbent , absorbent material
measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber absorptance , absorption coefficient , coefficient of absorption
dark band in the spectrum of white light that has been transmitted through a substance that exhibits absorption at selective wavelengths absorption band
(chemistry) a process in which one substance permeates another; a fluid permeates or is dissolved by a liquid or solid absorption , soaking up
(chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected accelerator , catalyst
(medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance actinotherapy , irradiation , radiation , radiation therapy , radiotherapy
transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy active transport
(chemistry) the capacity of a substance to take part in a chemical reaction activity
someone who is physiologically dependent on a substance; abrupt deprivation of the substance produces withdrawal symptoms addict
substance that allows fusion adhesive
substance that unites or bonds surfaces together adhesive , adhesive agent , adhesive material
glue or sticky substance adhesive , mucilage
material having capacity or tendency to adsorb another substance adsorbent , adsorbent material
coating of substance on surface of solid or liquid adsorption
surface of substance, accumulation on adsorption
any substance that adulterates (lessens the purity or effectiveness of a substance) adulterant , adulterator
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