The Collaborative International Dictionary of English v.0.48:
Drupaceous \Dru*pa"ceous\, a. [Cf. F. drupac['e].] (Bot.) Producing, or pertaining to, drupes; having the form of drupes; as, drupaceous trees or fruits. [1913 Webster]WordNet (r) 3.0 (2006):
drupaceous adj 1: of or related to a drupe