Definitions for oncidiumɒnˈsɪd i əm
Random House Webster's College Dictionary
on•cid•i•umɒnˈsɪd i əm(n.)
any of numerous American orchids of the genus Oncidium, having clusters of showy flowers.
Origin of oncidium:
< NL (1800)
oncidium, dancing lady orchid, butterfly plant, butterfly orchid(noun)
any orchid of the genus Oncidium: characterized by slender branching sprays of small yellow and brown flowers; often grown as houseplants