genus Chimonanthus ge·nusc·hi·monanthus uncommon noun 1. small genus of Asian deciduous or evergreen shrubs having fragrant flowers: winter sweet SynonymsChimonanthusgenus Chimonanthus Related words Broader terms magnoliid dicot genus Parts Calycanthaceae Part of Japan allspice WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.