different between arity vs acrity

English

From -ary (taken from unary/binary/ternary [function/operator]) + -ity. Compare adicity and adinity.

arity (plural arities)

(logic, mathematics, computer science) The number of arguments or operands a function or operation takes. For a relation, the number of domains in the corresponding Cartesian product.
(mathematics, computer science) The maximum number of child nodes that any node in a given tree (data structure) may have.
(Lojban grammar) the number of arguments (in Lojban grammar called sumti) specified in the definition of a selbri. (the selbri combined with the sumti make up a bridi).

Latin acritas, from ?cer (“sharp, pungent”) +? -it?s.

acrity (uncountable)

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