Definition of "bioassay" [bioassay]

• Determination of the strength or biological activity of a substance, such as a drug, by comparing its effects with those of a standard preparation on a test organism. (noun)
• A test used to determine such strength or activity. (noun)
• To cause to undergo a bioassay. (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "There is a minimal 24-hour window after exposure to Uranium to order a urine or fecal bioassay."
• "Cellular bioassay of fish as a sensitive index of water quality related to ash from coal combustion: Technical completion report by D."
• "A continuous-flow periphyton bioassay: tests of nutrient limitation in a tundra stream."