ALL meanings of international unit
in·ter·na·tion·al u·nit
I i - noun international unit an internationally agreed upon standard, as measured by bioassay, to which samples of a substance, as a drug or hormone, are compared to ascertain their relative potency. 1
- noun international unit the particular quantity of such a substance, which causes a specific biological effect. Abbreviation: IU. 1
- noun international unit A particular, minute unit of mass, defined differently for different substances, but so that varying substances of the same general type have the property that one international unit of the one has the same effect on the human body as one international unit of the other. 0