Source : Webster's Revised Unabridged Dictionary (1913)

Sarse \Sarse\, n. [F. sas, OF. saas, LL. setatium, fr. L. seta a
   stiff hair.]
   A fine sieve; a searce. [Obs.]

Sarse \Sarse\, v. t.
   To sift through a sarse. [Obs.]