Pertaining to chemistry (or, formerly, to alchemy): same as chemical, but now used chiefly in poetry.Imitative; adulterated; not the genuine thing. See alchemy, 3.n. A chemist or an alchemist.n. In bleaching, a dilute solution of chlorid of lime.In bleaching, to steep, as cotton goods, in a dilute solution of chlorid of lime in stone vats, the liquor being pumped up and strained through the goods until the action is complete.n. Specifically A solution or liquor of chlorid of lime or bleaching-powder for bleaching vegetable matter, as cotton.