The Collaborative International Dictionary of English v.0.48:

Searce \Searce\, n. [See Sarse.]
   A fine sieve. [Obs.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Searce \Searce\, v. t.
   To sift; to bolt. [Obs.] --Mortimer.
   [1913 Webster]