(1) - Setaceous (a.) Bristelike in form or texture; as, a setaceous feather; a setaceous leaf. (2) - Setaceous (a.) Set with, or consisting of, bristles; bristly; as, a stiff, setaceous tail.
(1) - Setback (n.) A backset; a check; a repulse; a reverse; a relapse. (2) - Setback (n.) A backset; a countercurrent; an eddy. (3) - Setback (n.) Offset, n., 4.