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Use; practice; exercise. [Obs.] Fuller. Let us be sure of this, to put the best in ure That lies in us. Chapman.

A very soluble crystalline body which is the chief constituent of the urine in mammals and some other animals. It is also present in small quantity in blood, serous fluids, lymph, the liver, etc.

Of or pertaining to urea; containing, or consisting of, urea; as, ureal deposits.

An apparatus for the determination of the amount of urea in urine, in which the nitrogen evolved by the action of certain reagents, on a given volume of urine, is collected and measured, and the urea calculated accordingly.

A glucoside extracted from the leaves of a certain plant (Urechitis suberecta) as a bitter white crystalline substance.

A poisonous glucoside found accompanying urechitin, and extracted as a bitter white crystalline substance.

One of the stages in the life history of certain rusts (Uredinales), regarded at one time as a distinct genus. It is a summer stage preceding the teleutospore, or winter stage. See Uredinales, in the Supplement.

The thin-walled summer spore which is produced during the so- called Uredo stage of certain rusts. See (in the Supplement) Uredinales, Heteroecious, etc.

Any one of the many complex derivatives of urea; thus, hydantoin, and, in an extended dense, guanidine, caffeine, et., are ureides. [Written also ureid.]

The duct which conveys the urine from the kidney to the bladder or cloaca. There are two ureters, one for each kidney.

Inflammation of the ureter. Dunglison.

edicine as a hypnotic. By extension, any one of the series of related substances of which urethane proper is the type.

The canal by which the urine is conducted from the bladder and discharged.

Of or pertaining to the urethra. Urethral fever (Med.), fever occurring as a consequence of operations upon the urethra.

Inflammation of the urethra.

An operation for the repair of an injury or a defect in the walls of the urethra. -- U*re`thro*plas"tic, a.

An instrument for viewing the interior of the urethra.

Examination of the urethra by means of the urethroscope.

An instrument for cutting a urethral stricture.

An incision of the urethra, esp. incision for relief of urethral stricture.