# reflectance

> English word · Noun · frequency rank #55,050

## Definitions
1. The ratio of the flux reflected to that incident on a surface.

## Etymology
From reflect + -ance.

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