The Collaborative International Dictionary of English v.0.48:
Panax \Panax\ n. A genus of perennial herbs of eastern North America and Asia having aromatic tuberous roots: ginseng. Syn: genus Panax. [WordNet 1.5]WordNet (r) 3.0 (2006):
Panax n 1: perennial herbs of eastern North America and Asia having aromatic tuberous roots: ginseng [syn: Panax, genus Panax]