edible tuber of any of several yams
yam, yam plant (noun)
any of a number of tropical vines of the genus Dioscorea many having edible tuberous roots
sweet potato with deep orange flesh that remains moist when baked
edible tuberous root of various yam plants of the genus Dioscorea grown in the tropics world-wide for food
YAM is a MIME-compliant e-mail client written for AmigaOS based computers. It supports multi-POP3, APOP, SMTP, TLSv1/SSLv3, multiple users, PGP, unlimited hierarchical folders, filters, a configurable GUI and an ARexx interface and many other features which are common for Mail User Agents today.