litmus

n. 石蕊 [化] 石蕊

发音

其它 /ˈlɪtməs/

词形变化

litmuses 复数 litmuses

释义与例句

n.
  1. 1.

    A dyestuff extracted from certain lichens, that changes color when exposed to pH levels greater than or less than certain critical levels.

    石蕊

    不可数 可数
  2. 2.

    A simple test of acidity in a liquid using litmus, usually in the form of litmus paper.

    可数 不可数
  3. 3.

    A simple test of any attribute; a litmus test.

    可数 不可数

词汇关系

名词

同义词 1

litmus test

上位词 1

acid-base indicator

整体词 1

litmus paper

相关短语

litmus test [机] 石蕊试验 litmus paper [化] 石蕊试纸 [医] 石蕊试纸 litmus tests litmus papers litmus milk [化] 石蕊牛乳(培养基) [医] 石蕊乳(细菌培养基) litmus milks

词源

From Middle English litmose, lytmose, litemose, from Old Norse litmosi (“moss used for dyeing”), from lita (“to dye, stain”) + mosi (“moss”), the former from litr (“colour, dye, blee”), from Proto-Germanic *wlitiz, *wlituz (“appearance, blee”), from Proto-Indo-European *wel- (“to see”). Cognate with Old English wlite (“appearance, form, brightness, countenance”). More at moss.

来源：wiktionary