equipondious

From Latin aequipondium (“an equal weight”), from aequus (“equal”) + pondus (“weight”).

equipondious (not comparable)

1. (obsolete, rare) Of equal weight on both sides; balanced.
   • 1665, Joseph Glanvill, chapter XXVII, in Scepsis Scientifica: Or, Confest Ignorance, the Way to Science; in an Essay of the Vanity of Dogmatizing, and Confident Opinion with a Reply to the Exceptions of the Learned Thomas Albius‎^[1], London: E. Cotes, page 168:

     And what happineſs is there in a ſtorm of paſſions? On this account the Scepticks affected an indifferent æquipondious neutrality as the only means to their Ataraxia, and freedom from paßionate diſturbances.

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