A material substance, usually of a specified kind; a material; a concoction, a compound; an ingredient. In later use chiefly applied to substances…
| 单词 | θ71530 |
| 释义 | the world > matter > chemistry > chemical substances > [noun] (42) thingeOE A material substance, usually of a specified kind; a material; a concoction, a compound; an ingredient. In later use chiefly applied to substances… substancea1550 spec. A kind of matter of a definite chemical composition, as a compound or element. body1594 Chemistry. Originally: †any of the four elements (earth, fire, water, and air) believed to constitute matter; a material substance made from one… magnesium chloride1866 a colourless deliquescent substance, MgCl2, which occurs in various mineral deposits, and is used as a source of metallic magnesium and in… magnesium sulphate1871 a soluble white crystalline substance, MgSO4, which occurs in various minerals such as epsomite and kieserite, and is used medicinally as a laxative… Subcategories:— types by properties (16) — substance which makes something less chemically reactive (1) — small grain or speck of a chemical substance (1) — substance with a snow-like appearance (1) — liver-coloured substance (1) — substance which readily forms complexes (1) — condition of (1) — chemicals (10) — essence or essential principle (5) |
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