%yam%

n. (Chem.) A white amorphous substance, regarded as a polymeric modification of isocyanic acid. [ 1913 Webster ]

n. (Chem) A complex derivative of cyanogen, regarded as an acid, and known chiefly in its salts; -- called also hydromellonic acid. [ 1913 Webster ]

prop. n. a genus of whale lice.
Syn. -- genus Cyamus. [ WordNet 1.5 ]

n. [ See Hyoscyamus. ] (Chem.) An alkaloid found in henbane (Hyoscyamus niger), and regarded as its active principle. It is also found with other alkaloids in the thorn apple and deadly nightshade. It is extracted as a white crystalline substance, with a sharp, offensive taste. Hyoscyamine is isomeric with atropine, is very poisonous, and is used as a medicine for neuralgia, like belladonna. Called also hyoscyamia, duboisine, etc. [ 1913 Webster ]

‖n. [ L., fr. Gr. &unr_;; &unr_; a sow, hog + &unr_; a bean. ] 1. (Bot.) A genus of poisonous plants of the Nightshade family; henbane. [ 1913 Webster ]

2. (Med.) The leaves of the black henbane (Hyoscyamus niger), used in neuralgic and pectorial troubles. [ 1913 Webster ]

n. [ See Leam. ] A leash. [ Obs. ] [ 1913 Webster ]

n. [ Oxy- (b) + ammonia. ] (Chem.) Same as Hydroxylamine. [ 1913 Webster ]

‖ [ Written also Tsung-li-Yamen or Tsungli Yamen. ] [ Chin. ] The board or department of foreign affairs in the Chinese government. See Yamen. [ Webster 1913 Suppl. ]

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 ]

‖n. [ Skr. yama a twin. ] (Hindoo Myth.) The king of the infernal regions, corresponding to the Greek Pluto, and also the judge of departed souls. In later times he is more exclusively considered the dire judge of all, and the tormentor of the wicked. He is represented as of a green color, with red garments, having a crown on his head, his eyes inflamed, and sitting on a buffalo, with a club and noose in his hands. [ 1913 Webster ]

n. [ Chin. ya a civil or military court + men a gate. ] In China, the official headquarters or residence of a mandarin, including court rooms, offices, gardens, prisons, etc.; the place where the business of any public department is transcated. [ Webster 1913 Suppl. ]

n. [ See Llama. ] (Zool.) The llama. [ 1913 Webster ]