- Biology. any small, beaklike process.
- Botany. a beaklike modification of the stigma in many orchids.
- a projecting part of the scolex in certain tapeworms.
- a part of the mouth in many insects, designed for sucking.
Origin of rostellum
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for rostellum
Anthera fere immersa, Rostellum integrum ut in omnibus glandula orbotis Pollinia 8.
I want to know whether anything beats in modification the rostellum of Catasetum.
Asa Gray's observations on the rostellum of Gymnadenia are very imperfect, yet worth looking at.
One has a rostellum without hooks, like the tni of the vegetable-feeders, the other has hooks like those of the carnivora.Animal Parasites and Messmates
P. J. Van Beneden
So in other cases, but I have not completely traced (only seen) that going to the rostellum.
- 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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- A small beaklike part, such as the hooked projection on the head of a tapeworm.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.