Webster's English Dictionary

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orchid

or.chid \'o.r-k*d\ n [irreg. fr. NL Orchis] 1: a plant or flower of a large 
   family (Orchidaceae, the orchid family) of  perennial epiphytic or 
   terrestrial plants having usu. showy flowers with a corolla of three petals 
   of which one differs greatly from the others 2: a variable color averaging 
   a light purple