English version

free radical

From Longman Dictionary of Contemporary Englishfree radicalˌfree ˈradical noun [countable] technical 🔊 🔊 an atom or group of atoms with at least one free electron, which combines with other atoms very easily 🔊 It is thought that free radicals can damage cells.
Examples from the Corpus
free radicalAs a result, new classes of free radical are particularly interesting to chemists.
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