equilibrity

From Latin aequilibritas (“equal distribution”).

equilibrity (usually uncountable, plural equilibrities)

1. The state of being balanced; equality of weight; equilibrium.
   • 1644, Kenelme [i.e., Kenelm] Digby, “Of Three Other Motions Belonging to Particular Bodies Filtration, Restitution, and Electricall Attraction”, in Two Treatises. In the One of which, the Nature of Bodies; in the Other, the Nature of Mans Soule; is Looked into: In Way of Discovery, of the Immortality of Reasonable Soules, Paris: […] Gilles Blaizot, →OCLC, 1st treatise (Declaring the Nature and Operations of Bodies), paragraph 3, page 168:

     Novv ouer this pinne, I haue putt one end of the lace, and as long as it hung no lovver thẽ [then, i.e., than] the board vpõ [upon] vvhich the reſt of the lace did lye, it ſtirred not; for as the vveight of the looſe end carried it one vvay, ſo the vveight of the other ſide vvhere the vvhole vvas, drevv it the other vvay, and in this manner kept it in equilibrity.

• “equilibrity”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.