Indicator and Litmus paper

Indicator noun - An arrow-shaped piece on a dial or scale for registering information.

Litmus paper and indicator are semantically related In some cases you can replace phrase "Litmus paper" with "Indicator", this terms are similar.

Nearby Words: indicate, indication, indicated, indicative, indicating

Litmus paper noun - Unsized paper treated with litmus for use as an acid-base indicator.

Indicator and litmus paper are semantically related in acid-base indicator topic. You can use "Indicator" instead a noun phrase "Litmus paper".