A person or thing that assigns or determines equivalent values.
From 'equivalue' with the agent suffix '-er', creating a noun for one who performs the action of equivaluing. This is an extremely rare technical term not found in standard dictionaries.
Though virtually extinct in modern usage, this word represents an old pattern in English where we could add '-er' to almost any verb to mean 'one who does that thing'—a flexibility we've largely abandoned in favor of longer phrases.
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