bipinnaria

/bahy-pi-nair-ee-uh/US // ˌbaɪ pɪˈnɛər i ə //

双子星,琵琶树,琵琶岛,琵琶湖

Definitions

n.名词 noun

1
plural bi·pin·nar·i·ae [bahy-pi-nair-ee-ee], /ˌbaɪ pɪˈnɛər iˌi/, bi·pin·nar·i·as.
- : the free-swimming, bilaterally symmetrical larva of certain starfishes.

The presence of two rings instead of one distinguishes the Bipinnaria from the Auricularia.
The commonest and most thoroughly investigated form of Asteroid larva is a free-swimming form known as Bipinnaria.
Ontologically, however, the two bands of Bipinnaria do not appear to arise from the division of a single band.
Bipinnaria or Branchiolaria: The larval stage of starfishes.
The egg becomes a sort of infusoria, the infusoria becomes a bipinnaria, and this produces the Asterias.