bi•o•as•say
Pronunciation: (n.bī"ō-u-sā', -as'āv.bī"ō-u-sā'), [key]
— n., v., -sayed, -say•ing.
—n.
- determination of the biological activity or potency of a substance, as a vitamin or hormone, by testing its effect on the growth of an organism.
—v.t.
- to subject to a bioassay.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.