The plural form of aerarium; the state treasuries or public funds of ancient Rome.
Latin plural of aerarium, from aes meaning 'bronze' or 'money' (since Roman money was originally bronze). The -aria ending is the standard Latin plural suffix.
The word 'aeraria' comes from 'aes' (bronze money), reminding us that the word for treasury was literally named after the material money was made from—ancient branding at its finest!
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