| spherocytic anaemia | <haematology> A hereditary disorder that leads to a chronic haemolytic anaemia due to an abnormality in the red blood cell membrane. This disorder is caused by a defective gene. Red cells are resistant to stress and rupture easily. Infants may appear jaundiced and pale. Fatigue, weakness and shortness of breath are other symptoms that may be seen in older patients. The spleen may also be enlarged. Treatment includes splenectomy (removal of the spleen). After this is accomplished the life-span of the red blood cells returns to normal. (27 Sep 1997) |
|---|---|
| spherocytic jaundice | Haemolytic jaundice associated with spherocytosis. (05 Mar 2000) |
| spherocytosis | <haematology> A condition in which erythrocytes lose their biconcave shape and become spherical. It occurs as cells age and is also found in individuals with abnormal cytoskeletal proteins, (hereditary spherocytosis, a disorder that leads to haemolytic anaemia). (18 Nov 1997) |
| spherocytosis, hereditary | A familial congenital haemolytic anaemia characterised by numerous abnormally shaped erythrocytes which are generally spheroidal. The erythrocytes have increased osmotic fragility and are abnormally permeable to sodium ions. (12 Dec 1998) |
| spherograph | An instrument for facilitating the practical use of spherics in navigation and astronomy, being constructed of two cardboards containing various circles, and turning upon each other in such a manner that any possible spherical triangle may be readily found, and the measures of the parts read off by inspection. Origin: Sphere + -graph. Source: Websters Dictionary (01 Mar 1998) |
| spheroid | Spheroidal Shaped like a sphere. Origin: L. Spheroideus (05 Mar 2000) |
| spheroid articulation | A multiaxial synovial joint in which a more or less extensive sphere on the head of one bone fits into a rounded cavity in the other bone, as in the hip joint. Synonym: articulatio spheroidea, articulatio cotylica, cotyloid joint, enarthrodial joint, enarthrosis, socket joint, spheroid articulation, spheroid joint. (05 Mar 2000) |
| spheroid calcification | <radiology> Round/oval subcutaneous calcifications, characteristic of Ehlers-Danlos syndrome (12 Dec 1998) |
| spheroid colony | A colony of protozoa in which the individual cells are held together in a coherent spherical mass by a gelatinoid material. (05 Mar 2000) |
| spheroid joint | A multiaxial synovial joint in which a more or less extensive sphere on the head of one bone fits into a rounded cavity in the other bone, as in the hip joint. Synonym: articulatio spheroidea, articulatio cotylica, cotyloid joint, enarthrodial joint, enarthrosis, socket joint, spheroid articulation, spheroid joint. (05 Mar 2000) |
| spheroidal | Having the form of a spheroid. <physics> Spheroid"ally, Spheroidal state, the state of a liquid, as water, when, on being thrown on a surface of highly heated metal, it rolls about in spheroidal drops or masses, at a temperature several degrees below ebullition, and without actual contact with the heated surface, a phenomenon due to the repulsive force of heat, the intervention of a cushion of nonconducting vapor, and the cooling effect of evaporation. Origin: Cf. F. Spheroidal. Source: Websters Dictionary (01 Mar 1998) |
| spheroids | Spherical, heterogeneous aggregates of proliferating, quiescent, and necrotic cells in culture that retain three-dimensional architecture and tissue-specific functions. They represent an in-vitro model for studies of the biology of both normal and malignant cells. Generally the ability to form spheroids is a characteristic trait of malignant cells derived from solid tumours, though cells from normal tissues can also form spheroids. (12 Dec 1998) |
| spheromak | <radiobiology> A compact torus with comparable toroidal and poloidal magnetic fields. The plasma is roughly spherical and is usually surrounded by a close-fitting conducting shell or cage. Both the poloidal and toroidal magnetic fields are generated by plasma currents. There are no toroidal field coils linking the plasma through the central plasma axis. External force is supplied by poloidal field coils outside the plasma separatrix. The resulting configuration is approximately a force-free magnetic field. The spheromak machine geometry can be simpler than a tokamak, but the close-fitting wall is a source of impurities and the current cannot be inductively driven. After early experiments failed to achieve a reasonable beta, interest has ebbed. The spheromak can also be considered as the low-aspect-ratio limit of the tokamak. See: compact torus. (09 Oct 1997) |
| spheromere | <zoology> Any one of the several symmetrical segments arranged around the central axis and composing the body of a radiate anmal. Origin: Sphere + -mere. Source: Websters Dictionary (01 Mar 1998) |
| spherometer | <physics> An instrument for measuring the curvature of spherical surface, as of lenses for telescope, etc. Origin: Sphere: cf. F. Spherometre. Source: Websters Dictionary (01 Mar 1998) |
| sphincterotomy |
Cutting of the sphincter of Oddi in order to relieve obstruction of the bile and pancreatic ducts
출처: glenlivet.mph.ed.ac.uk/endo/private/glossary.htm
|
|---|---|
| spherical aberration |
A lens fault which results in degraded image quality at the film plane. It is caused by light rays passing through the lens from a single point on the optical axis focused at different points according to incident height. Spherical aberration can be reduced by stopping down the lens.
출처: www.startphoto.com/learn/glossary/glossary_so-sz.h...
|
| sphincter |
A circular muscle constricting an opening. Sphincter muscles control bowel and bladder evacuation.
출처: www.azspinabifida.org/gloss.html
|
| sphincter |
a ring of muscle that opens and closes (eg, the anus).
출처: www.shortbowel.com/glossary/s.asp
|
| sphincteroplasty |
also called rectal sphincter repair, it is a surgical procedure used to correct a defect in the anal sphincter muscles.
출처: www.shortbowel.com/glossary/s.asp
|