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English definition of “specialist”

specialist

noun [C]    /ˈspeʃ·ə·lɪst/
someone who limits his or her studying or work to a particular area of knowledge, and who is an expert in that area: She’s a specialist in financial management. A specialist is also a doctor who works in and knows a lot about one particular area of medicine: an eye/heart/joint specialist
(Definition of specialist noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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