A person or device that circularizes information, especially by sending out circular letters or notices (American spelling).
From 'circularize' plus '-er,' a suffix meaning 'one who does' or 'a thing that does.' The '-er' agent noun suffix is one of English's most ancient and productive tools.
Circularizers in the pre-digital era were like human xerox machines—they had to develop incredible organizational systems to manage mailing lists, making them the original database administrators!
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