What does cereus mean?
Cereus is a noun referring to a group of large, typically columnar cacti belonging to the genus Cereus and several closely related genera in the cactus family. Native primarily to the Americas, these plants are characterized by tall, ribbed, cylindrical stems that can grow to impressive heights, giving some species a tree-like presence in desert landscapes. The word also commonly appears in the phrase 'night-blooming cereus,' which describes certain cacti celebrated for their spectacular white flowers that open only after dark and fade by morning, making them a favorite subject of midnight viewing parties among gardeners. Because the genus has been extensively reclassified by botanists, 'cereus' is now used somewhat loosely in horticulture to cover a range of columnar forms. The term derives from Latin cereus, meaning 'wax' or 'waxy,' an allusion to the pale, waxy appearance of the plants' stems or flowers. It is chiefly a technical or gardening term, encountered in botanical writing, nursery catalogs, and discussions of desert flora rather than in ordinary conversation.
nounA cereus is any of various large, mostly columnar cacti of the genus Cereus and related genera, native chiefly to the Americas. The term also refers to a night-blooming cactus whose large white flowers open after dark.
- Any of various columnar cacti of the genus Cereus and closely related genera.
- A night-blooming cactus (especially species formerly placed in Cereus) prized for its large, fragrant flowers that open at night.
"The saguaro-like cereus towered over the desert garden, its ribbed columns silhouetted against the evening sky."
"Botanists reclassified many former members of the sprawling genus Cereus into smaller groups."
"Gardeners gathered at midnight to watch the night-blooming cereus unfurl its blossoms."
Standard English pluralization; avoid the Latinate 'cerei', which is not established in English usage.
"Several cereuses lined the sunny south wall of the greenhouse."
The night-blooming cereus opens its enormous white flowers only after sunset, and each bloom lasts just a single night.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cereus
The word cereus comes directly from Latin cereus, meaning 'wax' or 'waxy,' itself derived from cera, the Latin word for beeswax. It was adopted as the scientific name of the cactus genus by Carl Linnaeus in the 18th century, evidently alluding to the waxy or candle-like quality of the plants' columnar stems or pale flowers. Related English words sharing this Latin root include cerate (a medicated wax ointment) and cerumen (earwax).
Related word forms
How cereus is actually used
A botanical and horticultural term rather than everyday vocabulary; used mainly by gardeners, botanists, and plant enthusiasts. In casual use, 'night-blooming cereus' is far more common than the bare word 'cereus'.
Easily confused with cereus
'Serious' is an adjective meaning grave or solemn, while 'cereus' is a noun denoting a genus of columnar cacti; they sound nearly identical in some accents.