Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «X»:
Xeroradiograph: A picture of the body recorded on paper rather than on film. Also called a xerogram.
From the Greek "xeros" meaning "dry."...
Xeroradiography: The process of making a type of dry x-ray in which a picture of the body is recorded on paper rather than on film....
Xerosis: Abnormal dryness of the skin (xeroderma), of the conjunctiva of the eye (xerophthalmia), or of the mucous membranes such as dry mouth (xerostomia).
The word "xerosis" literally means "dry condition." It was compounded from the Greek roots "xero-" (dry) and "-osis" (condition)....
Xerostomia: Dry mouth. The condition of not having enough saliva to keep the mouth wet due to inadequate function of the salivary glands. Everyone has a dry mouth once in a while when they are nervous, upset or under stress. But if someone has a dry mouth all or most of the time, it can be uncomfort...
Xiphoid process: A pointed cartilage attached to the lower end of the breastbone or sternum, the smallest and lowest division of the sternum. Cartilaginous early in life, it may become ossified (bony) in adults. It is sometimes simply called the xiphoid. Also known as the ensiform cartilage or proc...
XP: Xeroderma pigmentosum....
XRT: Medical abbreviation for radiotherapy....
XTC: A street name for 3-4 methylenedioxymethamphetamine. See: Ecstasy....
Xuezhikang: One of the three major preparations of red yeast rice, a tradition Chinese medicine now used to lower cholesterol....
XX: The sex chromosome complement of a normal
human female. See also X chromosome....
XX gonadal dysgenesis with sensorineural deafness
XX gonadal dysgenesis with sensorineural deafness: See Perrault syndrome....
XX male syndrome
XX male syndrome: A syndrome characterized by the presence of an XX sex chromosome complement in an individual with male genitalia including both testes but no sperm production (azoospermia).
Babies with the XX male syndrome may come to medical attention at birth because of hypospadias (urethral ope...
XXX syndrome: A chromosome condition present in
1 in 1000 females, due to the presence of three X chromosomes
rather than the usual two. The condition is associated with increased height but no malformations. Intelligence ranges from above normal to mild retardation. The average IQ is 85 to 90. Lea...
XXXX syndrome: A chromosome disorder in
females caused by the presence of four X chromosomes rather than the usual two. The disorder is characterized by decreased intelligence (IQ 30 to 80; average 55), speech and behavioral problems, tall stature and reduced fertility. Also known
as tetra-X syndr...
XXXXX syndrome: A chromosome disorder in
females, caused by the presence of five X chromosomes rather than the usual two. It is characterized by decreased intelligence (IQ 20 to 75) and multiple malformations including upward-slanting palpebral fissures (eyeslits), heart defect, and small