The Collaborative International Dictionary of English v.0.48:
Pepsi Cola \Pepsi Cola\, Pepsi-Cola \Pepsi-Cola\prop. n. [A trademark of the Pepsi-Cola Corporation.] A carbonated soft drink flavored by extract from the cola nut (kola nut). The nut is found on trees of the species Cola acuminata and Cola nitida. [Trademark] Syn: Pepsi [WordNet 1.5 + PJC]