Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «S»:
Smell disorder: See: Olfactory disorder....
Smell, inability to
Smell, inability to: No sense of smell is called anosmia. It can be due to loss of the sense of smell or failure for it to develop.
Loss of the sense of smell can be due to a number of things including swelling within the nose that prevents odors from gaining access to the olfactory (smell) area. Th...
Smith-Lemli-Opitz syndrome: A multiple congenital malformation syndrome caused by an abnormality in cholesterol metabolism, deficiency of the enzyme 7-dehydrocholesterol reductase (DHCR7), due to mutation of the DHCR7 gene on chromosome 11.
The syndrome is characterized by growth retardation, micro...
Smith-Magenis syndrome: A syndrome of abnormal physical, developmental and behavioral features due to microdeletion of chromosome 17 (loss of a very small segment from chromosome 17).
The face is characterized by a short flat head, prominent forehead, broad square face, upslanting eyeslits, deep-s...
Smoke, environmental tobacco
Smoke, environmental tobacco: Abbreviated ETS. See: ETS....
Smoke, second-hand: Environmental tobacco smoke that is inhaled involuntarily or passively by someone who is not smoking.
Environmental tobacco smoke is generated from the sidestream (the burning end) of a cigarette, pipe or cigar or from the exhaled mainstream (the smoke puffed out by smokers) of c...
Smokeless tobacco: Tobacco that is not smoked but used in another form such as chewing tobacco or snuff. Cancers of the oral cavity (mouth, lip, tongue) have been associated with the use of chewing tobacco as well as snuff. The tumors often arise at the site of placement of the tobacco.
Smoking, involuntary: The involuntary inhaling of environmental tobacco smoke (ETS) by someone who is not smoking. See: ETS....
Smoking, passive: The inhaling of environmental tobacco smoke (ETS) by someone who is not smoking. See: ETS....
Smoldering leukemia: A condition in which the bone marrow does not function normally. It does not produce enough blood cells. This condition may progress and become acute leukemia. Smoldering leukemia also is called myelodysplastic
syndrome or preleukemia....
Smooth muscle: One of the three types of muscle tissue
in the body (skeletal, smooth, cardiac). Generally forms the supporting tissue of blood
vessels and hollow internal organs such as the stomach, intestine, and bladder. So named
because of the absence of microscopic lines called "cross-stria...
Snake: 1. A long limbless scaly reptile, some being poisonous.
2. The symbol of rejuvenation and healing in many ancient Mediterranean cultures. The Greek god Asclepius, who specialized in healing, had a single snake entwined around his staff -- the "Asclepian staff."...
Snake antivenin: Antibodies created in the blood of a horse or sheep when the animal is injected with snake venom. Antivenin works by neutralizing snake venom that has entered the body. Also called snake antivenom....
Snake antivenom: See: Snake antivenin.
Other spellings: Snake antivenin...
Snake bites: A bite of a venomous snake, such as a rattlesnake, copperhead, cottonmouth water moccasin, or coral snake. A bite from one of these snakes should be considered a medical emergency. See also: Rattlesnake bite; Snake antivenin....