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Term Definition

An allergic disease of mucous membranes of nose and upper air passages induced by external irritation.

Hearing loss

A sudden or gradual decrease in how well you can hear. Depending on the cause, it can range from mild to severe and can be reversible, temporary, or permanent. Hearing loss is also known as hearing impairment, which includes being born without hearing (congenital hearing loss).


A benign tumor of dilated blood vessels.


Describes joints that stretch farther than is normal. For example, some hypermobile people can bend their thumbs backwards to their wrists, bend their knee joints backwards, put their leg behind the head or other contortionist performances. It can affect a single joint or multiple joints throughout the body.


An abnormal congenital opening of the male uretha upon the undersurface of the penis. A urethral opening into the vagina.


One or two organs, purplish-brown in color, situated at the back of the abdominal cavity, one on each side of the spinal column. Their function is to excrete urine and to help regulate the water, electrolyte, and acid base content of the blood.

Learning disability (LD)

Refers to a group of disorders that affect a broad range of academic and functional skills including the ability to speak, listen, read, write and spell.


A micropenis is an abnormally small penis. A micropenis is usually less then 3 inches in length with the rest of the sexual organs being normal size.


A change in the genetic code either brought about spontaneously, though chemicals or radiation or inherited.


A physician trained to specialize in diseases affecting the nervous system.  


Constant, involuntary, cyclical movement of the eyeball.


A physician who treats women during pregnancy and parturition.


A physician who specializes in the treatment of disorders of the eye; an oculist.

Optic nerve damage

Any damage either structurally or functionally to the eye that may result in permanent visual loss.

Orofacial clefting

See cleft lip and cleft palate

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