| 单词 | proof vinegar |
| 释义 | > as lemmasproof vinegar proof vinegar n. now rare vinegar of standard strength (cf. sense 10a). ΚΠ 1839 A. Ure Dict. Arts 13 An excise duty of 2d. is levied on every gallon of..proof vinegar. 1876 Amer. Cycl. XVI. 359/2 The last is the strongest, containing 5 per cent of real acetic acid..it is called proof vinegar. 1911 Encycl. Brit. XXVII. 96/2 Malt vinegar is sold in four strengths designated 18, 20, 22, 24, the last being ‘proof’ vinegar, containing 6 % of acetic acid and having a specific gravity of 1.019. < as lemmas |
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