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touchstone

['tʌʧstəun] n

Probierstein m; Prüfstein m; Maßstab Qualität

Lydit m; Lydischer Stein

schwarzer Kieselschiefer

Probiersteine m; Prüfsteine m

English thesaurus

touchstone ['tʌʧstəun] n

(A.Rezvov); a fundamental or quintessential part or feature : basis (merriam-webster.com A.Rezvov); a test or criterion for determining the quality or genuineness of a thing (merriam-webster.com A.Rezvov); a black siliceous stone related to flint that is used to test the purity of gold and formerly silver by the streak left on the stone when rubbed by the metal (merriam-webster.com A.Rezvov)

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