- The expression of the amount or degree of any quality possessed by a substance, or of the degree of physical or chemical change normally occurring in that substance under stated conditions.
- The ratio or factor that relates a quantity observed under one set of conditions to that observed under standard conditions, usually when all variables are either 1 or a simple power of 10.
[L. co- + efficio (exfacio), to accomplish]
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Examples: glitazone, GI cocktail, etc.