# photoequivalence

> English word · Noun

## Definitions
1. Photochemical equivalence, as described by the Stark-Einstein law.

## Etymology
From photo- + equivalence.

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