Op"er*a*to*ry (?), n. A laboratory. [Obs.]
O"per*cle (?), n. [Cf.F. opercule. See Operculum.] 1. (Anat.) Any one
of the bony plates which support the gill covers of fishes; an
opercular bone.
The Gutenberg Webster's Unabridged Dictionary: Section M, N, and O · 第 1772 / 2147 题