1. genus of much-branched treelike or shrubby cacti with pronounced ribs and rounded needlelike spines and nocturnal flowers usually white; [syn: Cereus, genus Cereus]
WordNet (r) 3.0 (2006):
genus Cereus
n 1: genus of much-branched treelike or shrubby cacti with
pronounced ribs and rounded needlelike spines and nocturnal
flowers usually white [syn: Cereus, genus Cereus]