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myd·ri·at·ic | \ ˌmid-rē-ˈat-ik 
\
\Medical Definition of mydriatic
(Entry 1 of 2)
: causing or involving dilation of the pupil of the eye
mydriatic
nounMedical Definition of mydriatic (Entry 2 of 2)
: a drug that produces dilation of the pupil of the eye
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