litmus   (Sound)

The litmus has 1 Senses.

• litmus test, litmus
• リトマス
• 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
• 酸性溶液では赤になり、アルカリ溶液では青に変わる色剤（地衣類から作られる）