Ce·re·us n. Bot. A genus of plants of the Cactus family. They are natives of America, from California to Chili.
Note: ☞ Although several species flower in the night, the name Night-blooming cereus is specially applied to the Cereus grandiflorus, which is cultivated for its beautiful, shortlived flowers. The Cereus giganteus, whose columnar trunk is sometimes sixty feet in height, is a striking feature of the scenery of New Mexico, Texas, etc.
n : genus of much-branched treelike or shrubby cacti with
pronounced ribs and rounded needlelike spines and
nocturnal flowers usually white [syn: genus Cereus]