# jansky

> English word · Noun

## Definitions
1. A non-SI unit (symbol Jy) measuring electromagnetic flux density equal to 10⁻²⁶ watts per square meter per hertz.

## Etymology
Named after radio astronomer Karl Guthe Jansky.

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