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The degree to which or rate at which a drug or other substance is absorbed or becomes available at the site of physiological activity after administration.

bi′o·a·vail′a·ble (-lə-bəl) adj.


(Medicine) 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 intravenous. Also called: systemic availability
ˌbioaˈvailable adj


(ˌbaɪ oʊ əˌveɪ ləˈbɪl ɪ ti)

the extent to which a substance can be used by the body.
bi`o•a•vail′a•ble, adj.
References in periodicals archive ?
Acute moderate-intensity exercise induces vasodilation through an increase in nitric oxide bioavailiability in humans.
b) Pasteurisation does not affect the absorption or bioavailiability of L-citrulline from watermelon juice;
It is a novel agent belonging to the same class as cyclosporine and tacrolimus and has an oral bioavailiability similar to that of Sandimmune.