Hall-mark
Pronunciation : Hall"-mark`
Part of Speech : n.
Definition : Defn: The official stamp of the Goldsmiths' Company and other assay offices, in the United Kingdom, on gold and silver articles, attesting their purity. Also used figuratively; -- as, a word or phrase lacks the hall-mark of the best writers.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder