/ Dictionary / Index B bioavailability: Meaning and Definition of Find definitions for: bi•o•a•vail•a•bil•i•ty Pronunciation: (bī"ō-u-vā"lu-bil'i-tē), [key] — n. Biochem. the extent to which a nutrient or medication can be used by the body. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bioautography biobehavioral Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language