Category: S
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Syndactyly
A condition in which two toes or fingers are joined together with tissue. A birth defect in which two or more fingers or (more commonly) toes-are joined together, sometimes joined by the skin only but sometimes with bones and skin fused and a single nail. Many forms of syndactyly are inherited, and they affect boys…
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Syndactyl
Having two or more fingers or toes joined together when born.
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Synchysis
A condition in which the vitreous humour in the eye becomes soft. The fluid state of the vitreous of the eye. Luminous specks in the vitreous humor of the eye.
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Synchondrosis
A joint, as in children, where the bones are linked by cartilage, before the cartilage has changed to bone. Joint in which the surfaces are connected by a cartilage plate. A slightly movable joint in which the surfaces of the bones are separated by hyaline cartilage, as occurs between the ribs and sternum. This cartilage…
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Synarthrosis
A joint, e.g. in the skull, where the bones have fused together. An immovable joint in which the bones are united by fibrous tissue. Examples are the cranial sutures. A type of immovable joint with fibrous connective tissue or cartilage between the bone surfaces. Movement is absent or limited, and a joint cavity is lacking.…
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Synaptic connection
A link between the dendrites of one neurone with another neurone.
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Synalgia
A pain which is felt in one part of the body, but is caused by a condition in another part, e.g. pain in the groin which can be a symptom of a kidney stone or pain in the right shoulder which can indicate gall bladder infection. Pain experienced in one area but caused by harm…
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Symphysis menti
A point in the front of the lower jaw where the two halves of the jaw are fused to form the chin.
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Symphysiotomy
A surgical operation to make an incision in the pubic symphysis to make the passage for a fetus wider. A surgical procedure that splits the symphysis pubis to enlarge the pelvic diameter, aiding in challenging childbirths. However, this method is becoming outdated as most surgeons now opt for a cesarean section in such cases.
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Symphysiectomy
A surgical operation to remove part of the pubic symphysis to make childbirth easier. Removal of a part of the bone at the front of the pelvis (pubic symphysis) in order to aid childbirth. Surgical removal of the symphysis pubis.