water yam; winged yam; purple yam
Rare loanword referring to Dioscorea alata, a species of yam. The Japanese term 大薯 (だいしょ) is more common.
See also: ダイジョ
Water yam is widely cultivated in Southeast Asia.
Variant with interpunct; less common but still seen.
Loanword from English 'water yam'.