international unit

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international unit

n. Abbr. IU
1. The quantity of a biologically active substance, such as a hormone or vitamin, required to produce a specific response.
2. A unit of potency for similarly active substances, based on this quantity and accepted as an international standard.

in′terna′tional u′nit


n.
1. an internationally accepted standard, derived by bioassay, to which samples of a pharmaceutical substance are compared for ascertaining their relative potency.
2. the specific biologically effective quantity of such a substance.
Abbr.: IU
[1920–25]

international unit

A unit for measuring a biologically active substance, such as a hormone or vitamin.
Translations

International unit

n. unidad internacional, medida de una sustancia definida aceptada por la Conferencia Internacional de Unificación de Fórmulas.