The Collaborative International Dictionary of English v.0.48:

Cassimere \Cas"si*mere\, n. [Cf. F. casimir, prob. of the same
   origin as E. cashmere. Cf. Kerseymere.]
   A thin, twilled, woolen cloth, used for men's garments.
   [Written also kerseymere.]
   [1913 Webster]