argentarium en · NOUN Pronunciation /ˌɑː.d͡ʒənˈtɛəɹi.əm/ (Received-Pronunciation)/ˌɑɹ.d͡ʒənˈtɛɹi.əm/ (General-American) Meanings (uncountable) Roman alloy of lead and tin for tinning Synonyms plumbum argentarium