Pronunciation: (sēr'ē-us), [key]
1. any of various plants of the genus Cereus, of the cactus family, having large, usually white, funnel-shaped flowers.
2. any of several related, similar plants, esp. of the genera Hylocereus, Nyctocereus, and Selenicereus.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.