litmus paper definition

  • noun:
    • An unsized white paper impregnated with litmus and used as a pH or acid-base indicator.
    • Paper containing a water-soluble mixture of different dyes extracted from certain lichens. The ensuing sheet of paper can be used to try materials for acidity.
    • unsized report saturated with blue or purple litmus, -- found in evaluating for acids or alkalies.
    • unsized report addressed with litmus for usage as an acid-base indicator

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  • Hypernym for "litmus paper"
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