cactus

noun

cac·​tus ˈkak-təs 

plural cacti ˈkak-ˌtī 

-(ˌ)tē

or cactuses also cactus

: any of a family (Cactaceae, the cactus family) of plants that have succulent stems and branches with scales or spines instead of leaves and are found especially in dry areas (such as deserts)

Examples of cactus in a Sentence

Recent Examples on the Web

Some islands are lush and volcanic, with rainforests spilling into the sea; others are dry and desertlike, dotted with cactus and wind-bent divi-divi trees. —Bailey Berg, Architectural Digest, 23 Mar. 2026

For a more hands-on experience, Azteca Cactus Taco hosts cactus harvest classes on a working farm. —Latifah Al Hazza, Condé Nast Traveler, 17 Mar. 2026

And yet another story was inscribed along the cliffs and slopes below a number of those viewpoints, where the wind had sent burning embers rocketing into the canyon, igniting extensive pockets of agave, yucca and various species of cactus. —New York Times, 16 Mar. 2026

However, Easter cactus is from a different genus. —Arricca Elin Sansone, Southern Living, 15 Mar. 2026

Word History

Etymology

New Latin, genus name, from Latin, cardoon, from Greek kaktos

First Known Use

1738, in the meaning defined above

Phrases Containing cactus

• barrel cactus
• cactus wren
• Christmas cactus
• giant cactus
• organ pipe cactus
• prickly pear cactus
• Queen of the Night cactus
• rattail cactus

Rhymes for cactus

• actus
• practice
• practise
• tractus
• malpractice

Kids Definition

cactus

noun

cac·​tus ˈkak-təs 

plural cacti -ˌtī 

-(ˌ)tē

or cactuses also cactus

: any of a large family of flowering plants able to live in dry regions and having fleshy stems and branches that bear scales or prickles instead of leaves