Recta-ratio Definition

Origin of Recta-ratio

• First attested in 1677; Latin: rēcta (the feminine nominative singular form of rēctus, “right”, “proper”) + ratiō (“reason”, “calculation”), a calque of the Ancient Greek ὀρθός λόγος (orthos logos, “right reason”).

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• Addendum: Term used in a letter to "Tom" by John Locke, October 20, 1659.

  From Wiktionary