| chromosome satellite | A small chromosomal segment separated from the main body of the chromosome by a secondary constriction; in humans it is usually associated with the short arm of an acrocentric chromosome. (05 Mar 2000) |
|---|---|
| satellite | 1. An attendant attached to a prince or other powerful person; hence, an obsequious dependent. "The satellites of power." 2. <astronomy> A secondary planet which revolves about another planet; as, the moon is a satellite of the earth. See Solar system, under Solar. <zoology> Satellite moth, a handsome European noctuid moth (Scopelosoma satellitia). Origin: F, fr. L. Stelles, -itis, an attendant. <anatomy> Situated near; accompanying; as, the satellite veins, those which accompany the arteries. Source: Websters Dictionary (01 Mar 1998) |
| satellite abscess | An abscess closely associated with a primary abscess. (05 Mar 2000) |
| satellite cell | 1. Sparse population of mononucleate cells found in close contact with muscle fibres in vertebrate skeletal muscle. Seem normally to be inactive, but may be important in regeneration after damage. May be considered quiescent stem cell. 2. An alternative name for glia. (18 Nov 1997) |
| satellite cell of skeletal muscle | <anatomy> An elongated spindle-shaped cell occupying depressions in the sarcolemma and between it and the basal lamina; believed to play a role in muscle repair and regeneration by fusing with adjacent myofibre. Synonym: sarcoplast. (05 Mar 2000) |
| satellite cells | Neuroglial cell's surrounding the cell body of a ganglion cell in the spinal, cranial, and autonomic ganglia. (05 Mar 2000) |
| satellite communications | Communications using an active or passive satellite to extend the range of radio, television, or other electronic transmission by returning signals to earth from an orbiting satellite. (12 Dec 1998) |
| satellite DNA | <molecular biology> DNA, usually containing highly repetitive sequences, that has a base composition (and thus density) sufficiently different from that of normal DNA that it sediments as a distinct band in caesium chloride density gradients. (18 Nov 1997) |
| satellite metastasis | Metastasis within the immediate vicinity of a primary malignant neoplasm; e.g., skin adjacent to a melanoma. (05 Mar 2000) |
| satellite-rich heterochromatin | Heterochromatin that codes for 18 S and 28 S components of ribosomal RNA and is located close to the centromeres of certain chromosomes. (05 Mar 2000) |
| satellite RNA | <molecular biology> A small, self-splicing RNA molecule that accompanies several plant viruses, including tobaccoringspot virus. (09 Oct 1997) |
| satellite viruses | Defective viruses which can multiply only by association with a helper virus which complements the defective gene. Satellite viruses may be associated with certain plant viruses, animal viruses, or bacteriophages. They differ from satellite RNA (RNA, satellite) in that satellite viruses encode their own coat protein. (12 Dec 1998) |
| hospitals, satellite | Those hospitals which are extensions of a main hospital and are wholly or partly administered by that hospital. (12 Dec 1998) |
| DNA, satellite | DNA that contains many tandem (not inverted) repeats of a short basic repeating unit. Satellite DNA is located at very specific spots in the genome (on chromosomes 1, 9, 16 and the Y chromosome, the tiny short arms of chromosomes 13-15 and 21 and 22, and near the centromeres of chromosomes). (12 Dec 1998) |
| bovine virus diarrhoea virus | A virus of the genus Pestivirus, in the family Togaviridae, causing bovine virus diarrhoea; New York, Oregon, and Indiana strains of the virus are recognised. Synonym: mucosal disease virus. (05 Mar 2000) |