Medical Definition of colchicum
1 capitalized : a genus of chiefly fall-blooming Old World corm-producing herbs (family Liliaceae) that produce flowers resembling crocuses
2: a bulb, flower, or plant (as the autumn crocus) of the genus Colchicum
3: the dried corm or dried ripe seeds of the autumn crocus containing the alkaloid colchicine, possessing an emetic, diuretic, and cathartic action, and used to treat gout—called also
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