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Medical Dictionary Starting with U

Ulatrophia

Shrinking of the Gum or Falling Away of the Gum; Recession of the gums

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Ulcer

Ulcus; an open sore that occurs on the skin or on a mucous membrane because of the destruction of surface tissue

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Ulcerated Sore Throat

Cynanche; Any disease of the tonsils, throat, or windpipe, attended with inflammation, swelling, and difficulty of breathing and swallowing Dog Choak

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Ulcerative Colitis

A chronic condition in which ulcers occur on the mucous membrane lining of the colon (the end of the large intestine) and the rectum

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Ulcus

Ulcer; an open sore that occurs on the skin or on a mucous membrane because of the destruction of surface tissue

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Ultra-Rapid Virological Response (URVR)

Undetectable HCV RNA at Week 2 of treatment

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Ultrasonography (Ultrasound)

A method of visualizing the internal parts of the body, or a fetus within the uterus, using sound waves

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Ultrasound Scanning

An imaging procedure used to examine internal organs in which high-frequency sound waves are passed into the body, reflected back, and used to build an image; also sometimes called sonography

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Ultraviolet Light

A form of invisible light in sunlight that is responsible for the tanning and burning of skin and can cause cataracts and skin cancer

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Umbilical Cord

The tubal structure (consisting of two arteries and one vein) that connects the fetus to the placenta, supplying the fetus with oxygen and nutrients and removing some waste products

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Umbilical Hernia

A condition present at birth in which a part of the baby's intestines bulge through a weak area of the abdominal wall, creating a swelling around the navel

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Unconsciousness

A temporary or prolonged loss of awareness of self and of surroundings

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Undescended Testicle

A testicle that has not moved down from the abdomen, where it develops, into the scrotum

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Undetectable (Unquantifiable)

A term used to describe a viral load (amount of viral RNA) that is below the level of detection of the test being used

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Unerupted

Tooth/Teeth that have not penetrated into the oral cavity

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Unexposed

A wound or injury that does not break the skin

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Unhappy Triad

Classic knee injury sprain of medical collateral & anterior cruciate ligaments; damage to medial meniscus

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Unilateral

One-Sided; pertaining to or affecting but one side

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Universal Precautions

Techniques used by health-care providers (eg, use of gloves and face masks, proper disposal of used syringes) to prevent the spread of infectious diseases

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Universal/National Tooth Numbering System

A system that assigns a unique number (from 1-32) to permanent teeth, and a unique letter (A-T) for primary teeth

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Unsaturated Fat

A fat or oil found mainly in vegetables; thought to reduce the risk of coronary heart disease

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Upcode

Reporting a more complex and/or higher cost procedure than was actually performed Also known as overcoding

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Upper Respiratory Infection (URI)

Contagious infection of the upper respiratory tract

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Urea

A waste product of the metabolism of proteins that is formed by the liver and secreted by the kidneys

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Urease

An enzyme that catalyzes (increases the rate of) the hydrolysis of urea into carbon dioxide (CO2) and ammonia

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Uremia

Azotemia; abnormally high levels of waste products such as urea in the blood

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Ureters

Two tubes that carry urine from the kidneys to the bladder

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Urethra

The tube by which urine is released from the bladder

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Urethritis

Inflammation of the urethra

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Urethrocele

A bulging of the urethra into the vagina

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Urethrocystitis

Inflammation of the urethra and the bladder

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Urinalysis

A group of physical and chemical tests done on a sample of urine to check for various disorders, including those of the kidneys and urinary tract

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Urinary Calculus

A hard mass of mineral salts in the urinary tract Also called cystolith, urolith

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Urinary Diversion

An operation to allow urine passage when the bladder or urethra has become blocked or been removed

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