Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «A»:
Aarskog syndrome: See: Aarskog-Scott syndrome....
Aarskog-Scott syndrome: A syndrome of wide spaced eyes (ocular hypertelorism), front-facing (anteverted) nostrils, a broad upper lip, a malformed ("saddle-bag") scrotum, and laxity of the ligaments resulting in bending back of the knees (genu recurvatum), flat feet, and overly extensible fingers. Th...
Aase-Smith syndrome I
Aase-Smith syndrome I: A syndrome of congenital malformations (birth defects) characterized by hydrocephalus, cleft palate, and severe arthrogryposis (joint contractures). Other anomalies may include deformed ears, ptosis (drooping) of the eyelids, inability to open the mouth fully, heart defects, a...
Aase-Smith syndrome II
Aase-Smith syndrome II: A genetic disorder that may be detected during early infancy and is characterized by the presence of three bones (phalanges) within the thumbs (triphalangeal thumbs) rather than the normal two and abnormally reduced production of red blood cells (hypoplastic anemia).
Ab ovo: Latin expression for "from the beginning." Ab ovo literally means "from the egg."...
Ab-: Prefix meaning "from, away from, off" as in abduction (movement of a limb away from the midline of the body), ablate (carry or cut away), abnormal (away from normal), absorb (to suck away). Ab in Latin means "from."
"Abs" in the plural is commonly used slang for the abdominal muscles....
Abate: To lessen or decrease. After a boil is lanced, the pus can drain and the pain and tenderness abate. From the French abbatre, to beat down....
Abatement: A diminution, decrease or easing. In medicine there may be abatement of pain or any other symptom or sign. In the environment there may abatement in the degree of pollution. See also: Abate....
Abbreviations, prescription: A prescription, as is well known, is
a physician's order for the preparation and administration of a drug
or device for a patient. What may be less well known is that a
prescription has several parts:
The superscription (or heading) with the symbol R or Rx which
ABCD rating: A staging system for prostate cancer. See
the Jewett staging system....
Abdomen: The belly, that part of the body
that contains all of the structures between the chest and
the pelvis. The abdomen is separated anatomically from the chest
by the diaphragm, the powerful muscle spanning the body cavity below the lungs.
The abdomen includes a host of organs including the...
Abdomen, acute:The abrupt (acute) onset of
abdominal pain. A potential medical
emergency, an acute abdomen may
reflect a major problem with one of the organs in the
abdomen such as the appendix (being inflamed =
appendicitis), the gallbladder (inflamed = cholecystitis),
the intestine (an ulc...
Abdominal: Relating to the abdomen, the belly, that part of the body that contains all of the structures between the chest and the pelvis. The abdomen is separated anatomically from the chest by the diaphragm, the powerful muscle spanning the body cavity below the lungs.
The abdomen includes a host...
Abdominal aneurysm: An aneurysm
situated within the abdomen (belly). An aneurysm is a
localized widening (dilatation) of an artery, vein, or the
heart. At the area of an aneurysm, there is typically a
bulge and the wall is weakened and may rupture. The word
"aneurysm" comes from the Greek "an...
Abdominal aorta: The abdominal aorta is the final section of the aorta, the largest artery in the body.
It is a continuation of the thoracic aorta. It begins at the diaphragm, and runs down to the point where it ends (by splitting in two to form the common iliac arteries).
The abdominal aorta ...