Medical
Glossary


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

X.
X chromosome

one of the two sex chromosomes; determines female sex characteristics

X-linked disorder

a genetic disorder in which the abnormal gene is located on the X chromosome; those affected are almost always men

X-ray

see Radiography

Xanthelasma

fatty deposits around the eyes that are common in elderly people and are associated with high levels of cholesterol in the blood

Xanthine

a bronchodilator drug that is used to treat asthma

Xanthomatosis

a condition in which fatty deposits occur in various parts of the body, possibly leading to atherosclerosis

Xeroderma pigmentosum

a genetic disorder in which the skin is extremely sensitive to sunlight, causing it to age prematurely and leaving the individual particularly susceptible to skin cancer

Xerophthalmia

excessive dryness of the cornea and conjunctiva due to a lack of vitamin A

XYY syndrome

a disorder in which a man has an extra Y chromosome, causing him to be unusually tall and to have behavioural disorders

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