subs. phr. (old).—A physician: a velvet-cap formed a distinctive part of a doctor’s garb.

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  1606.  The Return from Parnassus, ii., 1 [DODSLEY, Old Plays, 1874, ix. 132]. Theodore. O Monsier, I have a singular care of your valetudo. It is requisite that the French physicians be learned and careful; your English VELVET-CAP is malignant and envious.

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