Nabalus na·ba·lus uncommon noun 1. genus of North American and east Asian perennial herbs; sometimes included in genus Prenanthes Synonymsgenus Nabalus Related words Word family Nabalus albaNabalus serpentarius Broader terms asterid dicot genus Parts Compositae Part of rattlesnake rootwhite lettucelion's foot WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.