Webster's English Dictionary

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coca

co.ca \'ko--k*\ n [Sp, fr. Quechua ku`ka] 1: any of several So. American 
   shrubs (genus Erythroxylon, family Ery throxylaceae); esp : one (E. coca) 
   with leaves resembling tea 2: dried leaves of a coca (as E. coca) 
   containing alkaloids inc luding cocaine