WordReference Random House Unabridged Dictionary of American English © 2025
on•cid•i•um
(on sid′ē əm),USA pronunciation n.
- Plant Biologyany of numerous tropical American orchids of the genus Oncidium, having clusters of flowers showing great variety in size, form, and color. Also called dancing lady orchid.
- Neo-Latin (1800), equivalent. to Greek onk(o)- (combining form of ónkos barb of an arrow) + Neo-Latin -idium -idium; so called from the crests on the labellum
'oncidium' also found in these entries (note: many are not synonyms or translations):