# radioactive

> English word · Adjective · IPA /ˌɹeɪdiəʊˈaktɪv/ · frequency rank #10,916

## Definitions
1. Exhibiting radioactivity.
2. Dangerous and disgusting, particularly of people or ideas.

## Etymology
Coined by Pierre Curie and Marie Curie in 1898 as French radio-actif, equivalent to English radio- + active.

## Common misspellings (15)
`ardioactive`, `raddioactive`, `radiaoctive`, `radioacctive`, `radioacitve`, `radioactiev`, `radioactivve`, `radioacttive`, `radioactvie`, `radioatcive`, `radiocative`, `radoiactive`, `raidoactive`, `rdaioactive`, `rradioactive`

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