Dictionary.com
definitions

bioavailability

[bahy-oh-uh-vey-luh-bil-i-tee]
noun Biochemistry.
  1. the extent to which a nutrient or medication can be used by the body.

Origin of bioavailability

First recorded in 1965–70; bio- + availability
Related formsbi·o·a·vail·a·ble, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for bioavailability

bioavailability

noun
  1. the extent to which a drug or other substance is taken up by a specific tissue or organ after administration; the proportion of the dose of a drug that reaches the systemic circulation intact after administration by a route other than intravenousAlso called: systemic availability
Derived Formsbioavailable, adjective
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
bioavailability in Medicine

bioavailability

[bī′ō-ə-vā′lə-bĭl′ĭ-tē]
n.
  1. The physiological availability of a given amount of a drug, as distinct from its chemical potency.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.