Definition of RADIOACTIVE

radioactive

Plural: radioactives

Adjective

  • exhibiting or caused by radioactivity
    • "radioactive isotope"
    • "radioactive decay"
    • "radioactive fallout"

Adj

  • Exhibiting radioactivity.
  • Dangerous and disgusting, particularly of people or ideas.

Noun

  • Any radioactive substance.

Examples

  • Even sleazy tactics and his radioactive mouth may not be able to contain this debacle.

Origin / Etymology

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

Antonyms

nonradioactive

Scrabble Score: 17

radioactive: valid Scrabble (US) TWL Word
radioactive: valid Scrabble Word in Merriam-Webster MW Dictionary
radioactive: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 19

radioactive: valid Words With Friends Word