Definition of "vergency" in английский

noun

1. (dated) The act of verging or approaching; tendency, inclination towards something.

   • 1721 Nathan Bailey, An Universal Etymological English Dictionary, E. Bell, London. "VERGENCY [of vergere, L.] a bending or declining away, from or to, inclining."

2. The reciprocal of the focal distance of a lens, used as a measure of the divergence or convergence of a pencil of rays.