| UROBILIN | • urobilin n. (Biochemistry) A yellow linear tetrapyrrole resulting from the breakdown of heme, produced when urobilinogen… • UROBILIN n. a brown pigment in faeces and sometimes urine. |
| UROBORIC | • uroboric adj. Cyclical. • uroboric adj. Self-devouring. • UROBORIC adj. of or like a uroboros, a circular symbol of a dragon or snake swallowing its own tail. |
| UROBOROS | • uroboros n. Alternative spelling of ouroboros. • UROBOROS n. a representation of a serpent with its tail in its mouth, symbolizing completion, totality, endlessness, etc., also OUROBOROS. |
| UROCHORD | • urochord n. (Zoology) a notochord that is limited to the caudal region; especially in the Urochordata. • urochord n. Any marine organism of the Urochordata. • UROCHORD n. a rodlike structure in certain lower vertebrates. |
| URODELAN | • urodelan n. (Zoology) Any member of the Urodela (syn. of Caudata). • URODELAN n. a member of the Urodela, newts and salamanders. |
| URODELES | • urodeles n. Plural of urodele. • URODELE n. one of the Urodela, tailless amphibians, including newts and salamanders. |
| UROGRAMS | • urograms n. Plural of urogram. • UROGRAM n. an X-ray of part of the urinary tract. |
| UROLITHS | • uroliths n. Plural of urolith. • UROLITH n. a small stone or calculus in the urinary tract. |
| UROLOGIC | • urologic adj. Of or pertaining to urology. • UROLOGIC adj. relating to urology, the study of urine, also UROLOGICAL. |
| UROMERES | • uromeres n. Plural of uromere. • UROMERE n. any one of the abdominal segments of an arthropod. |
| UROPODAL | • uropodal adj. (Zoology) Of or pertaining to a uropod. • UROPODAL adj. of or pertaining to a uropod, any one of the abdominal appendages of a crustacean. |
| UROPYGIA | • uropygia n. Plural of uropygium. • UROPYGIUM n. the rump of a bird which supports the tail feathers. |
| UROSCOPY | • uroscopy n. (Medicine) the diagnostic examination of urine. • UROSCOPY n. the diagnosis of diseases by inspection of urine, also OUROSCOPY. |
| UROSOMES | • urosomes n. Plural of urosome. • UROSOME n. the abdomen, or post-abdomen, of arthropods. |
| UROSTEGE | • urostege n. (Zoology) One of the plates on the underside of a snake’s tail. • UROSTEGE n. (Greek) a snake's ventral tail-plate. |
| UROSTOMY | • urostomy n. A surgically constructed opening in the urinary tract allowing urine to exit the body; the procedure… • UROSTOMY n. an artificial passage for urine. |
| UROSTYLE | • urostyle n. (Anatomy) A styliform process forming the posterior extremity of the vertebral column in some fishes and amphibians. • UROSTYLE n. a part of the vertebral column of frogs and toads. |