(os′in -īn) noun
Any passerine bird of the suborder Oscines, having the most highly developed vocal ability among birds, as thrushes, sparrows, etc.: commonly called singing birds.
—adjective Of or pertaining to the Oscines. [<NL <L oscen, oscinis a singing bird <ob- towards + canere sing]

(os′ēn, -in) noun Chem.
A decomposition product of scopolamine. [<G oscin, short for hyoscin hyoscine]