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English definition of “radical”

radical

adjective (extensive)    /ˈræd.ɪ.kəl/
specialized medical aimed at removing all diseased tissue: Cervical cancer may be cured with radical surgery when it is confined to the pelvis or regional lymph nodes. radically     /-i/ adverb C1 Barker introduced some radically new ideas.Very important or urgent
(Definition of radical adjective (extensive) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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