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Definition of: cactus
Our photo definition of cactus 
(kak′təs) noun plural ·tus·es or ·ti (-tī)
Any one of various polypetalous, green, fleshy, mostly leafless and spiny plants of the family Cactaceae, native in arid regions of America, often having showy flowers. [<L <Gk. kaktos a prickly plant]
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