[noun bahy-oh-uh-sey, -as-ey; verb bahy-oh-uh-sey]
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.
verb (used with object), bi·o·as·sayed, bi·o·as·say·ing.
to subject to a bioassay.
Origin of bioassay
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
noun (ˌbaɪəʊəˈseɪ, -ˈæseɪ)
a method of determining the concentration, activity, or effect of a change to substance by testing its effect on a living organism and comparing this with the activity of an agreed standard
(tr) to subject to a bioassay
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Determination of the strength or biological activity of a substance, such as a drug or hormone, by comparing its effects with those of a standard preparation on a test organism.
A test used to determine such strength or activity.
To cause to undergo a bioassay.biologic assay
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Determination of the relative purity of a substance, such as a drug or hormone, by comparing its effects with those of a standard preparation on a culture of living cells or a test organism.
A test used to determine such purity.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.