mydriasis
Concise Oxford English Dictionary © 2008 Oxford University Press:
mydriasis /ˌmɪdrɪˈeɪsɪs, mɪˈdrʌɪəsɪs/
▶noun Medicine dilation of the pupil of the eye.
– origin C19: via L. from Gk mudriasis.
'mydriasis' also found in these Oxford entries:

