# catacaustic

> English word · Noun · IPA /ˌkætəˈkɔːstɪk/

## Definitions
1. a caustic curve formed by light reflecting from a curved surface
2. the envelope of all rays that emanate from a specified point (the radiant point) and reflect from a given curve; the evolute of the orthotomic

## Etymology
From cata- + caustic.

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