DICT.TW Dictionary Taiwan

 litmus paper 名詞
 石蕊試紙,石蕊紙

 Lit·mus n.  Chem. A dyestuff extracted from certain lichens (Roccella tinctoria, Lecanora tartarea, etc.), as a blue amorphous mass which consists of a compound of the alkaline carbonates with certain coloring matters related to orcin and orcein.
 Note: ☞ Litmus is used as a dye, and being turned red by acids and restored to its blue color by alkalies, is a common indicator or test for acidity and alkalinity.
 Litmus paper Chem., unsized paper saturated with blue or red litmus, -- used in testing for acids or alkalies.
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 litmus paper
      n : unsized paper treated with litmus for use as an acid-base
          indicator