| 单词 | roman alum |
| 释义 | > as lemmasRoman alum Roman alum n. [compare Italian allume romano (1754 or earlier)] now historical a reddish native alum found in Italy, or a manufactured imitation of this; cf. rock alum n. ΘΚΠ the world > the earth > minerals > types of mineral > sulphates > [noun] > alum > Roman alum Romish alum1620 Roman alum1653 1653 J. Howell German Diet sig. Fffv The Pope hath long since publish'd a Manifesto, that if any shipp be taken by Pyrates, or cast away by storm being laden with Roman Allum, when he comes again he shall have it at halfe the rate he payed for it before. 1753 Chambers's Cycl. Suppl. at Alum Roman Alum properly denotes a rock Alum, of a red colour, prepared in the country near Rome. 1839 A. Ure Dict. Arts 38 It is probable that Roman alum is a sulphate of alumina and potash, with a slight excess of the earthy ingredient. 1917 H. F. V. Little in J. N. Friend Text-bk. Inorg. Chem. IV. 84 In this district [sc. La Tolfa] the manufacture of the so-called Roman alum is still an important industry. 2007 H. J. Cook Matters of Exchange vii. 272 Into the tin box was introduced sixty pints of the very best rum, freshly made, fifty pints of Roman alum very finely ground, [etc.]. < as lemmas |
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