Source : Webster's Revised Unabridged Dictionary (1913)

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 : WordNet®

setaceous
     adj : having or covered with protective barbs or quills or spines
           or thorns or setae etc.; "a horse with a short bristly
           mane"; "bristly shrubs"; "burred fruits"; "setaceous
           whiskers" [syn: {barbed}, {barbellate}, {briary}, {briery},
            {bristled}, {bristly}, {burred}, {burry}, {prickly}, {setose},
            {spiny}, {thorny}]