litmus

名词 n.
中文释义

英文释义

名词 n.
  1. A dyestuff extracted from certain lichens, that changes color when exposed to pH levels greater than or less than certain critical levels. uncountable
  2. A simple test of acidity in a liquid using litmus, usually in the form of litmus paper. countable,uncountable
  3. A simple test of any attribute; a litmus test. countable,uncountable

词形变化

litmuses plural

词汇关系

近义词
indicator
衍生词
azolitmin litmus milk litmus paper litmus test
相关词
acidic alkaline pH Roccella tinctoria Roccella fuciformis Roccella pygmaea Roccella phycopsis Lecanora tartarea Variolaria dealbata Ochrolechia parella Ochrolechia tartarea Parmotrema tinctorum Parmelia Roccella montagnei Dendrographa leucophoea

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.
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