rostellum

/ro-stel-uhm/US // rɒˈstɛl əm //UK // (rɒˈstɛləm) //

洛克斯泰尔,洛克斯勒,洛克斯泰尔姆,洛克菲勒

Definitions

n.名词 noun

1
plural ros·tel·la [ro-stel-uh]. /rɒˈstɛl ə/.
- : Biology. any small, beaklike process.
- : Botany. a beaklike modification of the stigma in many orchids.
- : Zoology. a projecting part of the scolex in certain tapeworms.a part of the mouth in many insects, designed for sucking.

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.