- Bot. a sterile, flaplike modified stigma that separates the anthers from the stigmas in some orchids
- a small, rounded projection bearing hooks on the head of certain tapeworms
- a beak-shaped, sucking mouthpart in certain insects
Origin of rostellumModl from L, diminutive of rostrum: see rostrum
A small beaklike part, such as a projection on the stigma of an orchid or the hooked projection on the head of a tapeworm.
Origin of rostellumLatin diminutive of rōstrum beak ; see rostrum .
- A small beak-like process or extension; a small rostrum.
- the rostellum of the stigma of violets, or of the operculum of many mosses
- (botany) A projecting part of the column in the flower of an orchid that separates the male stamen from the female gynoecium.
- (biology) A retractable protruding part at the anterior end of a soft-bodied tapeworm; the scolex from which it protrudes is often armed with hooks which serve to keep it in place attached to the host.