Past tense of bioassay; tested the biological activity or strength of a substance using living organisms or tissues.
From bioassay + -ed (past tense suffix). Emerged in scientific literature as bioassay became standard practice in pharmaceutical research during the mid-20th century.
Every modern medicine you take has been bioassayed countless times before reaching the pharmacy—scientists literally measure if it works by testing it on cells or animals to prove it's safe and effective.
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