| spheroid | Spheroidal Shaped like a sphere. Origin: L. Spheroideus (05 Mar 2000) |
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| 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) |