# nuller

> English word · Noun

## Definitions
1. An optical device that uses destructive interference to cancel out a strong light source, such as a star.

## Etymology
From null + -er.

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