英文英文字典
英文英文字典
古腾堡计划中的在线英语-英语词典
字典
Urea
(a.)
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.
Ureal
(a.)
Of or pertaining to urea; containing, or consisting of,
urea; as, ureal deposits.
Ureameter
(n.)
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.
Urechitin
(n.)
A glucoside extracted from the leaves of a certain plant
(Urechitis suberecta) as a bitter white crystalline substance.
Urechitoxin
(n.)
A poisonous glucoside found accompanying urechitin,
and extracted as a bitter white crystalline substance.
Uredo
(n.)
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.
Uredo
(n.)
Nettle rash. See Urticaria.
Uredospore
(n.)
The thin-walled summer spore which is produced during
the so-called Uredo stage of certain rusts. See (in the Supplement)
Uredinales, Heter/cious, etc.
Ureide
(n.)
Any one of the many complex derivatives of urea; thus,
hydantoin, and, in an extended dense, guanidine, caffeine, et., are
ureides.
Ureter
(n.)
The duct which conveys the urine from the kidney to the
bladder or cloaca. There are two ureters, one for each kidney.
Ureteritis
(n.)
Inflammation of the ureter.
Urethane
(n.)
A white crystalline substance, NH2.CO.OC2H5, produced by
the action of ammonia on ethyl carbonate. It is used somewhat in
medicine as a hypnotic. By extension, any one of the series of related
substances of which urethane proper is the type.
Urethra
(n.)
The canal by which the urine is conducted from the bladder
and discharged.
Urethral
(a.)
Of or pertaining to the urethra.
Urethritis
(n.)
Inflammation of the urethra.
Urethroplasty
(n.)
An operation for the repair of an injury or a defect
in the walls of the urethra.
Urethroscope
(n.)
An instrument for viewing the interior of the
urethra.
Urethroscopy
(n.)
Examination of the urethra by means of the
urethroscope.
Urethrotome
(n.)
An instrument for cutting a urethral stricture.
Urethrotomy
(n.)
An incision of the urethra, esp. incision for relief
of urethral stricture.