radioactive

adjective/ˌreɪdioʊˈæktɪv/

Frequency rank: #5,915 of 20,003 in the WORDED list (wordfreq data)

Meaning

Emitting radiation due to the decay of unstable atomic nuclei.

Illustration for the English word “radioactive”

Example sentence

Scientists must handle radioactive materials with extreme caution to protect themselves from harmful radiation.

Synonyms & related words

More words in ranks 5,901–6,000