litmus
/ˈlɪtməs/
- n.
- 石蕊
中文释义来自 ECDICT
词源链
- 英语English
litmus
词源说明
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.
释义
名词noun
- 1uncountableA dyestuff extracted from certain lichens, that changes color when exposed to pH levels greater than or less than certain critical levels.
- 2A simple test of acidity in a liquid using litmus, usually in the form of litmus paper.
- 3A simple test of any attribute; a litmus test.