ros·tel·lum (r -st l  m)n. pl. ros·tel·la (r -stl) A small beaklike part, such as a projection on the stigma of an orchid, a tubular mouthpart on some insects, or the hooked projection on the head of a tapeworm. [Latin, diminutive of r  strum, beak; see rostrum.]ros·tel lar adj. |
rostellum [rɒˈstɛləm]
n pl -la [-lə]
(Life Sciences & Allied Applications / 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
[from Latin: a little beak, from rōstrum a beak]
rostellate , rostellar adj
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