Tamias ta·mias uncommon noun 1. chipmunks of eastern North America Synonymsgenus Tamias Related words Word family TamiasciurusTamiasciurus douglasiTamiasciurus hudsonicusTamias striatus Broader terms mammal genus Parts Sciuridae Part of eastern chipmunk WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.