LITMUS


Meaning of LITMUS in English

lit ‧ mus /ˈlɪtməs/ BrE AmE noun [uncountable]

[ Date: 1300-1400 ; Language: Old Norse ; Origin: litmosi , from litr 'coloring substance' + mosi 'moss' ]

a chemical that turns red when it touches acid, and blue when it touches an ↑ alkali

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.