- a projecting part of the scolex in certain tapeworms.
- a part of the mouth in many insects, designed for sucking.
Words nearby rostellum
How to use rostellum in a sentence
I want to know whether anything beats in modification the rostellum of Catasetum.
It is to discover whether rostellum yet retains some of its primordial function of being penetrated by pollen-tubes.
Asa Gray's observations on the rostellum of Gymnadenia are very imperfect, yet worth looking at.
I did think it possible or probable that perfect fertilisation might have been effected through rostellum.
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