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English definition of “oncology”

oncology

noun [U]     /ɒŋˈkɒl.ə.dʒi/ US  /ɑːnˈkɑː.lə-/
the study and treatment of tumours (= masses of cells ) in the body CancerMedical studies and the people who study them oncologist     /-dʒɪst/ noun [C] CancerMedical studies and the people who study them
(Definition of oncology noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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