Catha uncommon noun 1. a genus of African evergreen shrubs characterized by thick leaves and white flowers Synonymsgenus Catha Related words Word family catharsisCatharactaCatharacta skuaCatharanthusCatharanthus roseusCathariCatharismCatharsCathartesCathartes auracatharticcathartidCathartidaeCathayCathayaCatha edulis Broader terms gymnosperm genus Parts Celastraceae Part of Catha edulis WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.