Ra*ce"mate (r*s"mt), n. (Chem.) A salt of racemic acid. Rac`e*ma"tion (rs`*m"shn), n. [L. racematio a gleaning, fr. racemari to glean, racemus a cluster of grapes. See Raceme.] 1. A cluster or bunch, as of grapes. Sir T. Browne.