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Definition of: Oncidium
(on·sid′ē·əm) noun
A large, varied genus of tropical American orchids with few leaves, and a loose raceme of striking flowers. They are among the most prized of cultivated orchids, O. papilio, the butterfly orchid, being one of the best-known. [<NL <Gk. onkos an arrow's barb; so called from the form of the lower petal]
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