Meaning of “free radical” in the English Dictionary

british dictionary

"free radical" in British English

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free radicalnoun [ C often plural ]

uk /ˌfriː ˈræd.ɪ.kəl/ us /ˌfriː ˈræd.ɪ.kəl/ specialized

a molecule that has an extra electron and therefore reacts very easily with other molecules:

Free radicals have been implicated in cancer and many other serious diseases.

(Definition of “free radical” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

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