Definition of radioactive
: of, caused by, or exhibiting radioactivity
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Examples of radioactive in a Sentence
Uranium and plutonium are radioactive.
Recent Examples of radioactive from the Web
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Inside, among scores of crumbling laboratories, a few dozen disposal experts are painstakingly decommissioning the radioactive remains of Iraq’s notorious nuclear program.
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The star received radioactive iodine therapy for the disease, which had spread to his lymph nodes.
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Most of the radioactive fallout occurred during 90 above-ground tests between 1951 and 1962.
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Neutrinos, which originate in the sun, the Earth, and even from the radioactive decay of elements in our own bodies, as well as from sources outside our galaxy, are vastly more abundant than photons.
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Areas in red along the Canadian border, West Coast and Gulf Coast seem to indicate Gilead's war front; a large chunk of the Southwest and lower Midwest are shaded yellow with what appear to be radioactive symbols - the Colonies, perhaps.
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This is a nation being strangled from the outside, that, as our glimpses at the radioactive Colonies has proven, isn't doing so well in the first place.
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Up to 124,000 tons of low-level radioactive soil and other materials from a contaminated former military supplier in Ohio will begin arriving at a Wayne County landfill next week, the U.S. Army Corps of Engineers has announced.
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Even a moderate amount of shielding would be enough to hide its radioactive signature from most detectors at shipping hubs.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'radioactive.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of radioactive
International Scientific Vocabulary
RADIOACTIVE Defined for English Language Learners
Definition of radioactive for English Language Learners
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: having or producing a powerful and dangerous form of energy (called radiation)
RADIOACTIVE Defined for Kids
Definition of radioactive for Students
: caused by or exhibiting radioactivity
- a radioactive element
Medical Dictionary
medical Definition of radioactive
: of, caused by, or exhibiting radioactivity
- radioactive isotopes
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radioactively
adverbLearn More about radioactive
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Spanish Central: Translation of radioactive Nglish: Translation of radioactive for Spanish speakers Britannica English: Translation of radioactive for Arabic speakers
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