(In orchid flowers) a shelf- or beaklike projection on the orchid column, derived from the median stigma lobe, that separates the fertile stigmatic surface from the anther, thereby preventing autogamy and aiding in gluing the pollinia to the pollinator;
Persistent stylar base on fruit;
A slender projection, like the beak of a bird, in Orchidaceae used for a specialised portion of the stigma on the column.
A mobile and retractable knob bearing hooks, present on the head (scolex) of certain tapeworms, e.g. Taenia and Echinococcus.
A fleshy protrusion on the anterior end of the scolex of a tapeworm, bearing one or more rows of spines or hooks.