n.
Pronunciation: ˌ b ī -( ˌ ) ō - ' a- ˌ s ā , -a- ' s ā
Function: noun
Date: 1912
: determination of the relative strength of a substance (as a drug) by comparing its effect on a test organism with that of a standard preparation
– bio · as · say \ -a- ' s ā , - ' a- ˌ s ā \ transitive verb