/ˌbaɪpɪˈnærɪi/; /ˌbaɪpɪˈnɑːri/ (bī-pin-AR-ee, bī-pin-AR-ee)

Definitions

1. noun

A larval stage in the life cycle of certain starfish or sea urchins, characterized by a distinctive double row of appendages.

“The marine biologist studied the development of bipinnariae in the ocean.”