Defn: Urinary hæmatin; — applied to the normal coloring matter of the urine, on the supposition that it is formed either directly or indirectly (through bilirubin) from the hæmatin of the blood. See Urochrome, and Urobilin.

UROHYAL
U`ro*hy"al, a. Etym: [2d uro- + the Gr. letter (Anat.)

Defn: Of or pertaining to one or more median and posterior elements in the hyoidean arch of fishes. — n.

Defn: A urohyal bone or cartilage.

UROLOGY
U*rol"o*gy, n. Etym: [1st uro- + -logy.] (Med.)

Defn: See Uronology.

UROMERE
U"ro*mere, n. Etym: [2d uro- + -mere.] (Zoöl.)

Defn: Any one of the abdominal segments of an arthropod.

URONOLOGY
U`ro*nol"o*gy, n. Etym: [Gr. -logy.] (Med.)

Defn: That part of medicine which treats of urine. Dunglison.