Pronunciation

/rəʊˈæktɪv/

Definitions

• Adjective: Characterized by the emission of radiation, especially as a result of nuclear decay or certain types of atomic reactions. For example: “The sample was highly radioactive.”
• Noun: The process or property of emitting radiation, often harmful to living organisms. For example: “The radioactive waste needed careful disposal.”
• Verb: To become contaminated or exposed to radioactive substances. For example: “The workers were regularly monitored for radioactivity.”

Phrases

• “Radioactive decay” describes the breakdown of atomic nuclei.
• “Radioactive shielding” is used to protect against radiation exposure.
• “Highly radioactive” refers to a substance with a strong radiation emission rate.

Example Sentences

• Adjective: “The area around the nuclear reactor was marked as highly radioactive.”
• Noun: “The scientists studied the long-term effects of radioactive fallout.”
• Verb: “The miners had to take precautions after being exposed to radioactivity.”

Synonyms

• Radioactive material
• Radioactive waste
• Ionizing radiation
• Radioisotopes
• Radioactivity

Antonyms

• Stable
• Non-radioactive
• Safe
• Inert