vorticella

/vawr-tuh-sel-uh/US // ˌvɔr təˈsɛl ə //UK // (ˌvɔːtɪˈsɛlə) //

漩涡,涡流,涡旋,旋涡

Definitions

n.名词 noun

1
plural vor·ti·cel·lae [vawr-tuh-sel-ee], /ˌvɔr təˈsɛl i/, vor·ti·cel·las.
- : any ciliated protozoan of the genus Vorticella, having a transparent, bell-shaped body with a retractile stalk.

In another one-celled animal called vorticella, part of the cell has become elongated and is contractile.
The cilia exist at the anterior end, and extend down a lateral fissure as in Vorticella.
In some cases the Vorticella assumes the form of a Podophrya (fig. 40), the surface becoming covered with tentacle-like processes.
Elie set to work with ardour and found that the stalk of the Vorticella had no muscular character.
Certainly in this case the organism can not be regarded as a Vorticella broken off its stalk, as Kent '81 suspected.