[ 'kəʊkə ]
■ noun
1》 a tropical American shrub grown for its leaves, which are the source of ~ine. [ Erythroxylum ~ .]
2》 the dried leaves of the ~ shrub mixed with lime and chewed as a stimulant by the native people of western South America.
Origin
C16: from Sp., from Aymara kuka or Quechua koka .