(n) any orchid of the genus Oncidium: characterized by slender branching sprays of small yellow and brown flowers; often grown as houseplants, Syn. butterfly orchid, dancing lady orchid, butterfly plant
(n) orchid of South and Central America having flowers similar to but smaller than Psychopsis papilio; sometimes placed in genus Oncidium, Syn. Oncidium papilio kramerianum
‖n. [ NL. ] (Bot.) A genus of tropical orchidaceous plants, the flower of one species of which (Oncidium Papilio) resembles a butterfly. [ 1913 Webster ]