Setaceous \Se*ta"ceous\, a. [L. seta a bristle: cf. F. s['e]tac['e].]

1. Set with, or consisting of, bristles; bristly; as, a stiff, setaceous tail.

2. Bristelike in form or texture; as, a setaceous feather; a setaceous leaf.

Source: Webster's Revised Unabridged Dictionary (1913)