What does "vergency" mean?

The act of verging or approaching; tendency, inclination towards something.

What is a synonym for "vergency"?

Common synonyms include: vergence.

noun

noun ·Rare ·Advanced level

Noun

1
The act of verging or approaching; tendency, inclination towards something. dated
"s.v. hanker: "vergency, incline""
2
The reciprocal of the focal distance of a lens, used as a measure of the divergence or convergence of a pencil of rays.
"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 […]"

"s.v. hanker: "vergency, incline""

verge + -ency, cf. New Latin vergentia (16th century), French vergence (18th century) and later English vergence (20th century).