Isotropic Substance

Science / Geology / Isotropic Substance: One in which the magnitude of a physical property, such as transmission of light is independent of crystallographic direction.
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Other Words for Substance

Substance Verb Synonyms: essence, pith, heart, core, gist, burden, theme, meat, kernel, nub, crux, sum total, sum and substance, point, gravamen, haecceity, quintessence, quiddity
Substance Noun Synonyms: meaning, import, significance, purport, signification, point
Substance Adjective Synonyms: material, matter, stuff, fabric, composition, make-up

Substance Abuse

Business / Human Resources (HR) / Substance Abuse: Defined as a destructive pattern of substance (i.e., narcotics or alcohol) use leading to clinically significant social, occupational or medical impairment. MORE

Substance-Specific Applied Research

Health / Disease / Substance-Specific Applied Research: A program of research designed to fill important data needs for specific hazardous substances identified in ATSDR's toxicological profiles. Filling these data needs would allow more accurate assessmen MORE

Toxic Substance Control Act

Business / Real Estate / Toxic Substance Control Act: Enacted by Congress in 1976, the act authorizes EPA to secure information on all new and existing chemical substances and to control any of these substances determined to cause an unreasonable risk to MORE

Toxic Substances Control Act (TSCA)

Business / Agriculture / Toxic Substances Control Act (TSCA): P.L. 94-469 (October 11, 1976) authorizes the Environmental Protection Agency to regulate toxic substances (any chemical that may present a risk of unreasonable harm to man or the environment). By def MORE

Pure Substance

Science / Chemistry / Pure Substance: A sample of matter that cannot be separated into simpler components without chemical change. Physical changes can alter the state of matter but not the chemical identity of a pure substance. Pure subs MORE

Montreal Protocol On Ozone Depleting Substances

Business / Agriculture / Montreal Protocol On Ozone Depleting Substances: An international agreement, to which the U.S. is a signatory, for controlling emissions of chemicals that deplete stratospheric ozone (including methyl bromide). The Clean Air Act Amendments of 1990 c MORE