Definition of cereus
: any of various cacti (as of the genus Cereus) of the western United States and tropical America
Origin of cereus
New Latin, genus name, from Latin, wax candle, from cera wax — more at cerumen
First Known Use: 1730
Seen and Heard
What made you want to look up cereus? Please tell us where you read or heard it (including the quote, if possible).