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binucleate
bio
bio-
bio-break
bio grab
bioaccumulation
bioactive
bioactivity
bioassay
bioastronomy
bioaugmentation
bioavailability
biocatalysis
biocenosis
biochemic remedy
biochemical
biochemical oxygen demand
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bioassay
bi·o·as·say [ b ō á sày, b ō a sáy ] (plural bi·o·as·says)


noun 
Definition:
 
test of substance's activity: a technique for determining the concentration or potency of a substance such as a drug by measuring its effect on an organism

bi·o·as·say transitive verb
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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