The AI-powered English dictionary
plural vergencies
(dated) The act of verging or approaching; tendency, inclination towards something. examples
The reciprocal of the focal distance of a lens, used as a measure of the divergence or convergence of a pencil of rays. quotations examples
When, by the pencil becoming oblique to the surface, the vergency produced on the pencil becomes changed, the primary and secondary focal points, V and H, separate […]
1863, The Civil Engineer and Architect's Journal