U`ro*nol"o*gy (?), n. [Gr. urine + -logy.] Med.
That part of medicine which treats of urine.
© Webster 1913.
This looks like a scanning error for urinology; but Google seems to show that it's a correct word. However, it is not correctly formed in Greek, so we can blame Dunglison for that. The usual word is of course urology. - Ed.