I. ˈkōkə noun
( -s )
Etymology: Spanish, from Quechua kúka
1. : any of several So. American shrubs of the genus Erythroxylon ; especially : a shrub ( E. coca ) with leaves resembling tea leaves that are chewed with alkali by natives of the Andean uplands to impart endurance
2. : the dried leaves of either of two cocas both containing several alkaloids of which cocaine is the most important:
a. : those of the coca ( Erythroxylon coca ) — called also Bolivian coca, Huanuco coca
b. : those of the related plant ( E. novagranatense ) — called also Peruvian coca, Truxillo coca
II.
Usage: usually capitalized
— a communication code word for the letter c