any of several uncultivated yams, especially Dioscorea villosa, of the U.S., having a woody, tuberous root.
Yams Vs. Sweet Potatoes: What’s The Difference?If you're not arguing about politics or whether or not it's time for Grandma to get some more grandchildren, there's one topic that's always guaranteed to make a splash at the Thanksgiving dinner table: Are those yams or sweet potatoes in your holiday casserole?
Origin of wild yam
First recorded in 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019