noun, feminine/vɛʁ.ʒɑ̃s/plural: vergences
the quality of being inclined or tending towards something; vergence, the simultaneous turning of both eyes when focusing.; vergence, a measure of convergence or divergence of rays.
“1738 Philippe Hecquet, La medecine naturelle chez Guillaume Cavelier, p. 646. "il [Hippocrate] recommande de bien s'assurer de la vergence des humeurs, cest-a-dire, d'où elles partent & vers où elles tendent."”
1738, glosses New Latin vergentia in the Latin translations of Hippocrates (16th century).