Liddell–Scott–Jones: μυδρίᾱσις

μυδρίᾱσις,εως, Ion.

μῠδ-ίησις,ιος,ἡ,

A. dilatation of the pupil, Cels. 6.6.37 , Gal. 10.171 , Cael.Aur. TP 2.6 , Aët. 7.54 ; prob. in same sense in Aret. SD 1.7 .