Main Entry: ros·tel·lum

Pronunciation: \rä-ˈste-ləm\

Function: noun

Etymology: New Latin, from Latin, diminutive of rostrum beak

Date: circa 1826

: a small process resembling a beak : a diminutive rostrum: as a : an extension of the stigma of an orchid flower b : an anterior prolongation of the head of a tapeworm bearing hooks

— ros·tel·lar \rä-ˈste-lər\ adjective