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yam 音標拼音: [j'æm] n. 山藥,洋芋 山藥,洋芋 yam n 1: edible tuber of any of several yams 2: any of a number of tropical vines of the genus Dioscorea many having edible tuberous roots [ synonym: { yam}, { yam plant}] 3: sweet potato with deep orange flesh that remains moist when baked 4: edible tuberous root of various yam plants of the genus Dioscorea grown in the tropics world- wide for foodYam \ Yam\ ( y[ a^] m), n. [ Pg. inhame, probably from some native name.] 1. ( Bot.) A large, esculent, farinaceous tuber of various climbing plants of the genus { Dioscorea}; also, the plants themselves. Mostly natives of warm climates. The plants have netted- veined, petioled leaves, and pods with three broad wings. The commonest species is { Dioscorea sativa}, but several others are cultivated. [ 1913 Webster] 2. ( Bot.) Any one of several cultural varieties of the sweet potato. [ U. S.] [ Webster 1913 Suppl.] { Chinese yam}, a plant ({ Dioscorea Batatas}) with a long and slender tuber, hardier than most of the other species. { Wild yam}. ( a) A common plant ({ Dioscorea villosa}) of the Eastern United States, having a hard and knotty rootstock. ( b) An orchidaceous plant ({ Gastrodia sesamoides}) of Australia and Tasmania. [ 1913 Webster] |
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