Examination of Roman numerals interrupting dinner? (7)

I believe the answer is:

medical

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'examination' is the definition.
(I know that medical is a type of examination)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for medical that I've seen before include "Relating to the art of healing" , "Check-up - declaim (anag)" , "Thorough health check" , "Fitness examination" , "Relating to treatment rather than surgery" .)

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