Barbule
Pronunciation : Bar"bule
Part of Speech : n.
Etymology : [L. barbula, fr. barba beard.]
Definition : 1. A very minute barb or beard. Booth.
2. (Zo?l.)
Defn: One of the processes along the edges of the barbs of a feather, by which adjacent barbs interlock. See Feather.
Source : Webster's Unabridged Dictionary, 1913