TOUCHSTONE - Definiția din dicționar
Traducere: română
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Touch"stone` (?), n. 1. (Min.) 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
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2. Fig.: Any test or criterion by which the qualities of a thing are tried.
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The foregoing doctrine affords us also a
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