The Collaborative International Dictionary
Equability \E`qua*bil"i*ty\, n. [L. aequabilitas, fr. aequabilis. See Equable.] The quality or condition of being equable; evenness or uniformity; as, equability of temperature; the equability of the mind.
For the celestial bodies, the equability and constancy
of their motions argue them ordained by wisdom.
--Ray.
Douglas Harper's Etymology Dictionary
1530s, from Latin aequabilitatem (nominative aequabilitas) "equality, uniformity, evenness," figuratively "impartiality," from aequabilis "equal, consistent, uniform" (see equable).
Wiktionary
n. A condition of being equable; uniformity.
Usage examples of "equability".
I suppose this equability of distribution effected through irradiation from a centre.
This cloud is the seeming impossibility of reconciling my truth, irradiation, with my truth, equability of diffusion.
He was handsome, kind, polished, learned, a lover of the arts, cheerful, witty in his conversation, a pleasant companion, and a man of perfect equability.