| 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) |
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| 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) |
| spherophakia | A congenital bilateral aberration in which the lenses are small, spherical, and subject to subluxation; may occur as an independent anomaly or may be associated with the Weill-Marchesani syndrome. Origin: sphero-+ G. Phakos, lens (05 Mar 2000) |
| spheroplast | Bacterium from which the cell wall has been removed but that has not lysed. (18 Nov 1997) |
| spheroplasts | Bacterial, yeast, or fungal cells that result after partial removal of the rigid cell wall, which forms a membrane-bound cell with a spherical shape that is dependent for its integrity on an isotonic or hypertonic medium. (12 Dec 1998) |
| spheroprism | A spherical lens decentered to produce a prismatic effect, or a combined spherical lens and prism. (05 Mar 2000) |
| spherosiderite | <chemical> Siderite occuring in spheroidal masses. Origin: Sphere + siderite. Source: Websters Dictionary (01 Mar 1998) |
| spherosome | <plant biology> Lysosome like compartment in plants that derives from the endoplasmic reticulum and is a site for lipid storage. Origin: Gr. Soma = body (18 Nov 1997) |
| spherospermia | Spheroid spermatozoa lacking an elongated tail, in contrast to the threadlike, tailed sperm of humans and other mammals (nematospermia). Origin: sphero-+ G. Sperma, seed (05 Mar 2000) |
| spherocytosis |
Spherocytosis is an auto-hemolytic anemia (a disease of the blood) characterized by the production of red blood cells that are sphere-shaped, rather than donut-shaped. It is caused by a molecular defect in one of the proteins of the red blood cell cytoskeleton (usually ankyrin, sometimes spectrin). ...
출처: en.wikipedia.org/wiki/Spherocytosis
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| spheroplast |
(formerly also sphaeroplast) A microbial or plant cell from which most of the cell wall has been removed, usually by enzymic treatment. Strictly, in a spheroplast, some of the wall remains, while in a protoplast the wall has been completely removed. In practice, the two words are often used interchangeably. See protoplast.
출처: www.fao.org/docrep/003/X3910E/X3910E22.htm
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| spherocyte |
small, round erythrocyte having the appearance of being completely filled with hemoglobin (no central area of pallor)
출처: learn.sdstate.edu/Deb_Pravecek/hematology_vocabula...
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| spherocylinder |
a combined spherical and cylindrical lens.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| spherocylindrical l. |
a lens with one spherical and one cylindrical surface, and functioning as both a simple spherical lens and a simple cylindrical one.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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