Sunday, 8 March 2009

What comes after primary, secondary, tertiary?

The sequence continues with quaternary, quinary, senary, septenary, octonary, nonary, denary. Words also exist for `twelfth order' (duodenary) and `twentieth order' (vigenary).

See http://www.askoxford.com/asktheexperts/faq/aboutwords/primary?view=uk

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