The Collaborative International Dictionary of English v.0.48:

Racemous \Rac"e*mous\ (r[a^]s"[-e]*m[u^]s or r[.a]*s[=e]"m[u^]s;
   277), a. [Cf. F. rac['e]meux.]
   See Racemose.
   [1913 Webster]