räˈsteləm noun
( -s )
Etymology: New Latin, from Latin, small beak, small snout, diminutive of rostrum beak — more at rostrum
1.
a. : a small process resembling a beak : a diminutive rostrum
b. : the apex of the gynaecium of an orchid flower that resembles a beak
2.
a.
(1) : the sucking beak of a louse
(2) : the beak of a hemipteran
b. : an anterior prolongation of the head of a tapeworm bearing hooks — see echinococcus illustration