mictŭrĭo, 4, v. desider. n. [mingo],
to go to make water, to make water (only in Juvenal): micturiunt hic, Juv. 6, 309; 16, 46.
micturiō —, —, īre, desid. cf. mingo, to go to make water, wish to make water , Iu. ...
An Elementary Latin Dictionary