Source : Webster's Revised Unabridged Dictionary (1913)

Orchid \Or"chid\, n. [See {Orchis}.] (Bot.)
   Any plant of the order {Orchidace[ae]}. See {Orchidaceous}.

Source : WordNet®

orchid
     n : any of numerous plants of the orchid family usually having
         flowers of unusual shapes and beautiful colors [syn: {orchidaceous
         plant}]