caudal keel

短语

词形变化

caudal keels 复数 caudal keels

释义与例句

n.
  1. 1.

    A lateral ridge found just anterior to each side of the tail fin on the caudal peduncle of some types of fast-swimming fish. The keels improve the stability of the fish's attitude at speed in the water, and strengthen the support of the caudal fin.

    生物 动物学