1

Unary means "consisting of one element"; is there a word meaning "consisting of more than one element"?

Poly-ary sounds wrong, as does mult-ary...

What is the opposite (in this sense) of unary?

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    Simply "non-unary"? ai.stanford.edu/~koller/Papers/Grove+al:96a.pdf – Yee-Lum Aug 12 '16 at 23:04
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    @Yee-Lum: But non-unary allows for nullary (niladic) also. The OP apparently wants n-ary where n > 1. – Drew Aug 12 '16 at 23:09
  • That's true. The title and body seem to be asking slightly different questions, in that case. – Yee-Lum Aug 12 '16 at 23:13
  • @Yee-lum I don't think opposite has such a concrete definition, so I clarified exactly which opposite I meant in the body. – MichaelChirico Aug 13 '16 at 1:28
  • "Plurality" technically fits, but has acquired conflicting meanings over the ages. – Hot Licks Nov 12 '17 at 22:38
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The word plurarity does not appear in the dictionary, but if you google it there are quite a few cases of it being used this way.

While plur- is a valid Latin prefix, English words using it usually start with plural-, pluralism for instance.

So I suppose it could be seen as a portmanteau of plural and arity.

In that same sense, a word for n-arity > 1, could be plurary.

  • This is a noun, not an adjective, though for that matter, I'm pretty sure simple plural fits the bill. – MichaelChirico Nov 13 '17 at 1:51
  • @MichaelChirico The word I'm recommending is plurary. See the last sentence. – Sam Washburn Nov 13 '17 at 1:53
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    Let's just hope the rural juror never has to use that word – MichaelChirico Nov 13 '17 at 1:58
  • @SamWashburn I missed that detail. It's a horrible word, but plurality is in the dictionary. – Simon B Nov 13 '17 at 9:50
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You can use multiple-arity if different numbers of arguments are accepted (e.g. a polymorphic function/method), or n-ary if you want to be indefinite about the arity. But I don't know of a term for arity > 1.

See https://en.wikipedia.org/wiki/Arity

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