assay-mark assaying • assay mill · · · Info · Definitions · Synonyms · Characters · · assay-mark · · Text Common · · Latin · · Scripts 10 · · Length 3 · · Syllables Definitions · · · (noun) a mark on an article of trade to indicate its origin and authenticity. Synonyms: authentication, hallmark. · · Noun Definition 1 Synonyms · · · authentication · · Synonym 1 hallmark · · Synonym 2 Characters · · - hyphen-minus U+002D a latin small letter a U+0061 k latin small letter k U+006B m latin small letter m U+006D r latin small letter r U+0072 s latin small letter s U+0073 y latin small letter y U+0079