An archaic or rare variant form meaning having equal weight or being perfectly balanced.
A less common variant combining equi- (equal) with a ponderis-based suffix, possibly influenced by Latin -ious endings. This form appears rarely in older philosophical texts.
Equipondious is the kind of word that would make a medieval scholar nod approvingly—it's basically a fancier, older way of saying 'equally weighted' that almost nobody uses anymore!
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