n. 鱼的触须, 鸟的羽小支

Barbule \Bar"bule\, n. [L. barbula, fr. barba beard.]
1. A very minute barb or beard. --Booth.

2. (Zo["o]l.) One of the processes along the edges of the
barbs of a feather, by which adjacent barbs interlock. See
{Feather}.