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Definition of opuntia
: any of a large genus (Opuntia) of American cacti with usually yellow flowers and flat or cylindrical jointed stem segments typically studded with tubercles bearing spines or prickly hairs — compare cholla, prickly pear
From the M-W Editors
Origin and Etymology of opuntia
Latin, a plant, from feminine of opuntius of Opus, from Opunt-, Opus Opus, ancient city in Greece
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Britannica.com: Encyclopedia article about opuntia
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