ammoniacum

== English == === Etymology === From Middle English armoniacum, from Latin ammōniacum, armōniacum. === Noun === ammoniacum (uncountable) A gum-resin exuded from the several perennial herbs in the genus Ferula of the umbel family (Apiaceae). Synonym: gum ammoniac ==== Translations ==== == Latin == === Etymology === Borrowed from Ancient Greek ἀμμωνιακόν (ammōniakón). === Noun === ammōniacum n (genitive ammōniacī); second declension gum ammoniac (Medieval Latin) ammonia (in water) ==== Declension ==== Second-declension noun (neuter).