Touchstone Definition

tŭchstōn
touchstones
noun
touchstones
A type of black stone formerly used to test the purity of gold or silver by the streak left on it when it was rubbed with the metal.
Webster's New World
Something by which others of its kind are measured or recognized; quintessential example or feature.
Webster's New World
A standard of comparison or evaluation.
Wiktionary
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Other Word Forms of Touchstone

Noun

Singular:
touchstone
Plural:
touchstones

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