1) Genus dioscorea 2) Plant genus 
They are tuberous herbaceous perennial lianas, growing to 2–12 m or more tall. The leaves are spirally arranged, mostly broad heart-shaped. The flowers are individually inconspicuous, greenish-yellow, with six petals; they are mostly dioecious, with separate male and female plants, though a few species are monoecious, with male and female flower...
• (n.) A genus of plants. See Yam.
(Cinnamon Vine, White Manila Yam, Yam) This is a group of tropical and subtropical vines that can be grown for ornament as well as a food crop.…
Di`os·co're·a noun [ New Latin Named after Dioscorides the Greek physician.] (Botany) A genus of plants. See Yam . 
[n] - yams
genus Dioscorea noun yams