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Touchstone :: Touchstone (n.) Any test or criterion by which the qualities of a thing are tried.

Test :: Test (n.) That with which anything is compared for proof of its genuineness; a touchstone; a standard.

Tuch :: Tuch (n.) A dark-colored kind of marble; touchstone.

Touch :: Touch (v.) A touchstone; hence, stone of the sort used for touchstone..

Touch-needle :: Touch-needle (n.) A small bar of gold and silver, either pure, or alloyed in some known proportion with copper, for trying the purity of articles of gold or silver by comparison of the streaks made by the article and the bar on a touchstone..

Touchstone :: Touchstone (n.) Lydian stone; basanite; -- so called because used to test the purity of gold and silver by the streak which is left upon the stone when it is rubbed by the metal. See Basanite.

Touch :: Touch (v. t.) To try; to prove, as with a touchstone..

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