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• n  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
• n  a test that relies on a single indicator

• litmus

News & Articles

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• Bill to preempt local labor laws reaches gov's desk
  A bill that may serve as a litmus test on Gov. Rick Scott's view of government reached his desk today, giving the governor 15 days to decide whether to sign or reject HB 655, which preempts local control over issues such as "sick time" and wages and replaces it with regulation from Tallahassee.
  June 10, 2013 - St. Petersburg Times Blogs
• Tour de France favorites hone final edge in Criterium du Dauphine, Tour de Suisse
  Tejay van Garderen is one of the favorites for the overall in the Swiss tour. Photo: Casey B. Gibson | www.cbgphoto.com Both races will provide an important litmus test on where everyone stands going toward the Tour, now less than three weeks away
  June 8, 2013 - Velo News