Cereus (Noun) — Genus of much-branched treelike or shrubby cacti with pronounced ribs and rounded needlelike spines and nocturnal flowers usually white.
Cereus (Noun) — Any of several night-blooming cacti of the genus Selenicereus.
Cereus (Noun) — Any of several cacti of the genus Hylocereus.
Cereus (Noun) — Any of several cacti of the genus Cereus.
Cereus (Noun) — Cactus of the genus Echinocereus.