litmus

Noun
  1. A coloring material (obtained from lichens) that turns red in acid solutions and blue in alkaline solutions;
    Used as a very rough acid-base indicator (synset 114965545)
    is a type of: acid-base indicator - an indicator that changes color on going from acidic to basic solutions
    substance meronym: litmus paper - unsized paper treated with litmus for use as an acid-base indicator
    same as: litmus test

Found on Word Lists

Other Searches