Dictionary.com

cactus

[ kak-tuhs ]
/ ˈkæk təs /
Save This Word!

noun, plural cac·ti [kak-tahy], /ˈkæk taɪ/, cac·tus·es, cac·tus.
any of numerous succulent plants of the family Cactaceae, of warm, arid regions of the New World, having fleshy, leafless, usually spiny stems, and typically having solitary, showy flowers.
QUIZ
ARE YOU A TRUE BLUE CHAMPION OF THESE "BLUE" SYNONYMS?
We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms.
Question 1 of 8
Which of the following words describes “sky blue”?
Meet Grammar CoachWrite or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing
Meet Grammar CoachImprove Your Writing
Write or paste your essay, email, or story into Grammar Coach and get grammar help

Origin of cactus

1600–10; <Latin <Greek káktos cardoon

OTHER WORDS FROM cactus

cac·tus·like, cactoid, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use cactus in a sentence

British Dictionary definitions for cactus

cactus
/ (ˈkæktəs) /

noun plural -tuses or -ti (-taɪ)
any spiny succulent plant of the family Cactaceae of the arid regions of America. Cactuses have swollen tough stems, leaves reduced to spines or scales, and often large brightly coloured flowers
cactus dahlia a double-flowered variety of dahlia

Derived forms of cactus

cactaceous (kækˈteɪʃəs), adjective

Word Origin for cactus

C17: from Latin: prickly plant, from Greek kaktos cardoon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
FEEDBACK