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cactus

[kak-tuh s] /ˈkæk təs/
noun, plural cacti
[kak-tahy] /ˈkæk taɪ/ (Show IPA),
cactuses, cactus.
1.
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.
Origin
1600-1610
1600-10; < Latin < Greek káktos cardoon
Related forms
cactuslike, cactoid, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for cactoid

cactus

/ˈkæktəs/
noun (pl) -tuses, -ti (-taɪ)
1.
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
2.
cactus dahlia, a double-flowered variety of dahlia
Derived Forms
cactaceous (kækˈteɪʃəs) adjective
Word Origin
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
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Word Origin and History for cactoid

cactus

n.

c.1600, from Latin cactus "cardoon," from Greek kaktos, name of a type of prickly plant of Sicily (the Spanish artichoke), perhaps of pre-Hellenic origin. Modern meaning is 18c., because Linnaeus gave the name to a group of plants he thought were related to this but are not.

Online Etymology Dictionary, © 2010 Douglas Harper
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