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A subclass of Mammalia, having a cloaca in which the ducts of the urinary, genital, and alimentary systems terminate, as in birds. The female lays eggs like a bird. See Duck mole, under Duck, and Echidna.

avities which open externally, such as those of the mouth, nose, lungs, intestinal canal, urinary passages, etc.

Of or pertaining to the kidneys or urinary organs; renal; as, a nephritic disease.

(Anat.), the tubes which primarily open into the segmental duct, some of which become the urinary tubules of the adult.

Of or pertaining to the urine; diuretic; urinary; as, uretic medicine.

the body. It is likewise a common constituent, either as the free acid or as a urate, of urinary or renal calculi and of the so-called gouty concretions. From acid urines, uric acid is frequently deposited, on standing in a cool place, in the form of a reddish yellow sediment, nearly always crystalline. Chemically, it…

Pertaining to the urinary and genital organs; genitourinary; urogenital; as, the urinogenital canal.

A yellow urinary pigment, considered by Thudichum as the only pigment present in normal urine. It is regarded by Maly as identical with urobilin.

The urinary bladder.

A reddish urinary pigment, considered as the substance which gives to the urine of rheumatism its characteristic color. It also causes the red color often seen in deposits of urates.

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.

ver, spleen, pancreas, and other organs, and also in urine (in small quantities) and some urinary calculi, and in the juices of certain plants; -- so called because it leaves a yellow residue when evaporated to dryness with nitric acid. Xanthine is closely related to uric acid.