# perimetry

> English word · Noun

## Definitions
1. The measurement of a perimeter.
2. The systematic measurement of light sensitivity in the visual field by the detection of the presence of test targets on a defined background.

## Etymology
From peri- + -metry.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/perimetry