1

The Wikipedia entry for arity lists a sequence of adjectives meaning in group of (a particular number of elements). When referring to numbers between 0 and 10, the -ary adjectives are:

  • 0 - nullary
  • 1 - unary
  • 2 - binary
  • 3 - ternary
  • 4 - quaternary
  • 5 - quinary
  • 6 - senary
  • 7 - septenary
  • 8 - octonary or octary
  • 9 - novenary or nonary
  • 10 - decenery or denary

Can this sequence be continued? What are the rules (if any) to form the adjective meaning n-ary (in group of n)?

2

You weren't so far from a slightly broader answer when you were on Wikipedia. http://exampleproblems.com/wiki/index.php/Arity lists a couple not mentioned above:

  • 0 - nullary or anary - 0
  • 11 - undenary
  • 12 - duodenary
  • 20 - vigesary
  • 100 - centenary
  • 1000 - millenary

Otherwise, I guess you're stuck with n-ary.

I don't know if terms for other irregul-arities combine: is there a "unvigesary" for 21 or "duovigesary" for 22 or other arbitrary combinations of number roots from ancient languages?

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.