# eikonal

> English word · Adjective

## Definitions
1. Describing the properties of a class of partial differential equation encountered in descriptions of wave propagation.

## Etymology
Ancient Greek εἰκών (eikṓn, “image”).

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