ˌpakə̇ˈrīzəs noun
Usage: capitalized
Etymology: New Latin, from Greek pachyrrhizos having a thick root, from pachy- + -rhizos (from rhiza root) — more at root
: a small genus of tropical herbaceous vines (family Leguminosae) with a tuberous root, trifoliate leaves, and white or purplish flowers — see yam bean