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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 yam /ˈjæm/
 山藥,洋芋

From: Webster's Revised Unabridged Dictionary (1913)

 Yam n.
 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.
 2. Bot. Any one of several cultural varieties of the sweet potato. [U. S.]
 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.
 

From: WordNet (r) 2.0

 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 [syn: 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 food