| 释义 |
‖ pulsellum Zool.|pʌlˈsɛləm|
Pl. -a.
[mod.L., f. puls-, ppl. stem of pellĕre to drive, after flagellum.]
A modified form of flagellum found in spermatozoa and certain infusorians, serving to propel the body through a liquid medium.
1880Kent Infusoria I. 429 Among the free-swimming monoflagellate Infusoria as at present known, where the locomotive appendage without exception fulfils during natation the rôle of a tractellum, its recognition by such title in contradistinction to a propelling organ or pulsellum is uncalled for. 1885E. R. Lankester in Encycl. Brit. XIX. 859/1 The flagellum of the Flagellata is totally distinct from the pulsellum of the Bacteria. |