英语词汇“universal indicator”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

universal indicator n. (a) any of various measuring devices designed to give consistent results in a variety of circumstances (now historical); (b) Chemistry a mixture of dyes that changes colour gradually over a range of pH and is used (esp. as indicator paper) in testing for acids and alkalis.

ΚΠ

1855 J. W. Bailey in Amer. Jrnl. Sci. 20 58 The object of the instrument I propose is more comprehensive than that of the ‘Finders’..being no less than to make a Universal Indicator, by means of which an observer can so register the position of any number of objects mounted upon slides.

1906 U.S. Patent 822,805 1/1 I..have invented a new and useful improvement in Universal Indicators... This invention..particularly has reference to indicators for calendars.

1925 Jrnl. Hygiene 23 377 The various antigens used..consisted of a basis of beef broth..and gave a reaction of 7.5 to the universal indicator.

1978 G. C. Hill & J. S. Holman Chem. in Context xvi. 240 Indicators such as litmus and universal indicator are decolourized when exposed to these gases.

2007 Western Daily Press (Nexis) 24 Jan. 30 He finished off with a karate-style move, knocking over a bottle of universal indicator which smashed on the floor.

单词	universal indicator
释义	> as lemmas universal indicator universal indicator n. (a) any of various measuring devices designed to give consistent results in a variety of circumstances (now historical); (b) Chemistry a mixture of dyes that changes colour gradually over a range of pH and is used (esp. as indicator paper) in testing for acids and alkalis. ΚΠ 1855 J. W. Bailey in Amer. Jrnl. Sci. 20 58 The object of the instrument I propose is more comprehensive than that of the ‘Finders’..being no less than to make a Universal Indicator, by means of which an observer can so register the position of any number of objects mounted upon slides. 1906 U.S. Patent 822,805 1/1 I..have invented a new and useful improvement in Universal Indicators... This invention..particularly has reference to indicators for calendars. 1925 Jrnl. Hygiene 23 377 The various antigens used..consisted of a basis of beef broth..and gave a reaction of 7.5 to the universal indicator. 1978 G. C. Hill & J. S. Holman Chem. in Context xvi. 240 Indicators such as litmus and universal indicator are decolourized when exposed to these gases. 2007 Western Daily Press (Nexis) 24 Jan. 30 He finished off with a karate-style move, knocking over a bottle of universal indicator which smashed on the floor. extracted from universaladj.n.adv. < as lemmas
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> as lemmas