n.
Pronunciation: - ə - ˌ v ā -l ə - ' bi-l ə -t ē
Function: noun
Date: 1971
: the degree and rate at which a substance (as a drug) is absorbed into a living system or is made available at the site of physiological activity
– bio · avail · able \ - ' v ā -l ə -b ə l \ adjective