(redirected from rostella)
Also found in: Medical, Encyclopedia.
Related to rostella: rostellum


n. pl. ros·tel·la (rŏ-stĕl′ə)
A small beaklike part, such as a projection on the stigma of an orchid or the hooked projection on the head of a tapeworm.

[Latin, diminutive of rōstrum, beak; see rostrum.]

ros·tel′lar adj.


n, pl -la (-lə)
(Biology) biology a small beaklike process, such as the hooked projection from the top of the head in tapeworms or the outgrowth from the stigma of an orchid
[C18: from Latin: a little beak, from rōstrum a beak]
rosˈtellate, rosˈtellar adj


(rɒˈstɛl əm)

n., pl. ros•tel•la (rɒˈstɛl ə)
1. any of various small, beaklike parts, as the mouth tube of sucking bugs or the hook-bearing projection of intestinal tapeworms.
2. a beaklike modified stigma of certain orchids that secretes a sticky fluid, enabling pollen grains to adhere to visiting insects.
[1750–60; < New Latin; Latin: little beak, snout, diminutive of rōstrum snout (see rostrum); for formation, see castle]