English

Noun

Japanese mountain yam ‎(plural Japanese mountain yams)

1. A Japanese species of yam, Dioscorea japonica
2. Another species of yam, Dioscorea polystachya, which is sometimes referred to as a mountain yam in China.

Usage notes

• There is a great deal of confusion about names for yams, even in very good references. Dioscorea japonica probably has the best etymological claim to the name, but usage is abundant for both.

Synonyms

• (Dioscorea japonica): yamaimo