| segmentation cavity | The cavity in the blastula of a developing embryo. Synonym: blastocoele, cleavage cavity, segmentation cavity. Origin: blasto-+ G. Koilos, hollow (05 Mar 2000) |
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| segmentation gene | <molecular biology> Genes required for the establishment of segmentation in the embryo. In Drosophila about 20 such genes are required. A development pattern of the embryo of the fruit fly Drosophila where the embryo looks like a stack of discs. Each disc is a segment, and each segment consists of two compartments (an anterior and posterior). Various parts of the adult fruit fly (wings, legs, eyes, etc.) arise from specific segments. (09 Oct 1997) |
| segmentation nucleus | The compound nucleus in the impregnated ovum, formed by conjugation of the nuclei of the ovum and spermatozoon (female and male pronuclei), the zygote nucleus after it commences the first cleavage division. (05 Mar 2000) |
| segmentectomy | Excision of a segment of any organ or gland. (05 Mar 2000) |
| segmented cell | A polymorphonuclear leukocyte matured beyond the band cell so that two or more lobes of the nucleus occur. (05 Mar 2000) |
| segmented leukocyte | Any mature polymorphonuclear leukocyte, especially a neutrophilic leukocyte. (05 Mar 2000) |
| segmented neutrophil | A fully matured neutrophil that has at least 2 (and as many as 5) distinct lobes in the nucleus and manifests active ameboid motion. Synonym: mature neutrophil. (05 Mar 2000) |
| segmenter | A schizont; usually applied to the malaria parasite developing in a red blood cell after having undergone nuclear and cytoplasmic division, just before cell rupture and release of the merozoites. (05 Mar 2000) |
| Segmentina | A genus of freshwater pulmonate snails (family Planorbidae, subfamily Segmentininae); includes the species Segmentina hemisphaerula, an important intermediate host of Fasciolopsis buski. Origin: L. Segmentum, fr. Seco, to cut (05 Mar 2000) |
| segmenting body | A sporozoan trophozoite (vegetative form) that reproduces by schizogony, producing a varied number of daughter trophozoites or merozoites. See: meront, segmenter. Synonym: agamont, segmenting body. Origin: schizo-+ G. On (ont-), a being (05 Mar 2000) |
| segments of liver | Territories of the liver with independent portobilioarterial distribution or independent venous drainage. The naming of segments in the NA is based upon the portobilioarterial distribution. See: anterior segment, lateral segment, medial segment, posterior segment. Synonym: segmenta hepatis, segments of liver. (05 Mar 2000) |
| segments of spinal cord | Portions of the spinal cord corresponding to the line of attachment of the roots of the individual spinal nerves. These are the cervical spinal cord segments [C1-C8]; the thoracic spinal cord segments [T1-T12]; the lumbar spinal cord segments Origin: L1-L5]; the sacral spinal cord segments [S1-S5]; and the coccygeal spinal cord segments [Co1-Co3]. Synonym: segmenta medullae spinalis. (05 Mar 2000) |
| segments of spleen | Splenic territories receiving independent arterial supply or drained by independent roots of the splenic vein. Synonym: segmenta lienis. (05 Mar 2000) |
| segmentum | Synonym: segment. Origin: L. Segment (05 Mar 2000) |
| segmentum anterius | A delimited part or section of an organ or other structure which lies in front of or ventral to the other similar parts or sections. 1) segmentum anterius (hepar); the anterior segment of the right lobe of the liver. 2) segmentum anterius (pulmo dexter et sinister); [S 3]; the anterior segment of the superior lobe of the right and left lungs. 3) anterior segment of the eye; the intraocular segment of the eyeball occupied by the aqueous which lies in front of, and is separated from the vitreous-filled posterior segment by, the lens and zonule; it is subdivided by the iris into anterior and posterior chambers. Synonym: segmentum anterius. (05 Mar 2000) |
| segmentectomy |
or segmental mastectomy: see Quadrantectomy
Ãâó: www.ehealthmd.com/library/breastcancer/BRC_glossar...
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| segment |
[seg-MENT] a subdivision of the body or of an appendage, between joints (sutures).
Ãâó: members.aol.com/YESedu/glossary.html
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| segmentation |
The process by which the correct number of segments are established in a developing segmented animal.
Ãâó: helios.bto.ed.ac.uk/bto/glossary/s.htm
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| segmentation |
to break a solid structure into a number of usually equal size pieces.
Ãâó: embryology.med.unsw.edu.au/Notes/Index/S.htm
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| segmentation |
The process of dividing a film into parts for analysis.
Ãâó: www.mhhe.com/socscience/art-film/bordwell_6_filmar...
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