Correct spelling for litmus

Medical definition of litmus:

Lacmus, a blue coloring matter obtained from Roccella tinctoria and other species of lichens; it is reddened by acids and turned blue again by alkalies.

Usage examples for litmus:

  • Then hold a piece of blue litmus paper in the acid solution, noting that it is turned red. "Physiology and Hygiene for Secondary Schools, – Francis M. Walters, A.M."
  • We have no litmus paper test for the charm of genius. "Dwellers in the Hills, – Melville Davisson Post"

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