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rostellum |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Rostellum \Ros*tel"lum\, n.; pl {Rostella}. [L. See {Rostel}.] A small beaklike process or extension of some part a small rostrum; as the rostellum of the stigma of violets, or of the operculum of many mosses; the rostellum on the head of a tapeworm.