subspecialist

/ˌsʌbˈspɛʃəlɪst/
noun
  1. A doctor or other professional who has advanced training and expertise in a specific area within a larger field of specialization.
    • If your eye problem is complex, your optometrist may refer you to a subspecialist in retinal diseases.
    • The hospital hired a subspecialist in pediatric neurology to treat children with rare brain disorders.
    • After medical school, she became a cardiologist and then a subspecialist in heart failure.
Antonyms
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