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Translate files Radioactive
/ˌreɪdi.oʊˈæk.tɪv/
Meaning & Definition
adjective
Emitting or relating to the emission of ionizing radiation or particles.
Uranium is a radioactive element used in nuclear fuel.
Capable of undergoing radioactive decay, leading to the emission of radiation.
Radon is a naturally occurring radioactive gas found in basements.
Describes materials or substances that emit radiation as a result of nuclear reactions.
The radioactive waste must be stored securely to prevent contamination.
Etymology
From the combination of 'radio-' meaning ray, and 'active' meaning capable of action.
Common Phrases and Expressions
radioactive waste
Waste that contains radioactive material and poses a potential threat to the environment.
radioactive decay
The process by which an unstable atomic nucleus loses energy by radiation.
radioactive isotope
An isotope that is unstable and emits radiation.
Related Words
radiation
The emission of energy as electromagnetic waves or as moving subatomic particles.
nuclear
Relating to the nucleus of an atom, often involving energy release.
Slang Meanings
Glow-in-the-dark
That watch is so radioactive, it practically glows in the dark!
Intensely exciting or dangerous
That party was radioactive; it was wild!