The Collaborative International Dictionary of English v.0.48:

Cedrat \Ce"drat\ (s[=e]"dr[a^]t), n. [Cf. F. c['e]drat. See
   Cedar.] (Bot.)
   Properly the citron, a variety of Citrus medica, with large
   fruits, not acid, and having a high perfume.
   [1913 Webster]