DIVISION

n. Di2-vi2z'yu3n. Gr., teupe<ri (1st def.). Lat.. divisio (from dividere, to divide). Fr., d. Ger., The i lung (1st def.). It., divis i one. Sp., division. 1. The proce by which anything is separated into a number of parts. 2. Any one of the parts so separated. 3. That which separates one part from another. [A, 301, 325 (a, 21); a, 24.1 Direct nuclear <1. Ger., directe Kern the i lung, Kernzerschnurung. The form of nuclear d. in which the nucleus simply divides into two or more parts without any special structural change in the nucleus being apparent. [Flemming, " Arch, f. path. Anat.," Ixxvii, 1879, p. 1 (J).J See CELL-d. D. cellulaire (Fr.). See CELL-d. D. directe des cellules (Fr.). See Direct CELL-d. D. endogene cellulaire (Fr.). See Internal CEiAs-formation. D. of cataract. See DISCISSION. D.-organ. Ger., The i lungs organ. A name sometimes applied to the cell-nucleus to indicate that its function is to produce cell-d. [J.] Indirect nuclear d. Fr., caryocinese. Ger., indirecte Kern the i lung. karyokinetische Kern the i lung. Syn.: caryocinesis. The form of nuclear d. in which a complicated series of structural changes takes place in the nucleus, or more especially in the nuclear flbriles, during the entire proce of d. [Flemming, "Arch. f. path. Anat.," Ixxvii, 1879, p. 1 (J).] See also CARYOCINESIS and CELL-d. Inferior d. of the thalamus. See Sub thalamic REGION. Nuclear d., Nucleus d. Ger., Kern the i lung. Syn.: nucleus-d. The d. of the nucleus of a cell. This is either direct, by a constriction appearing and deepening till the nucleus is divided into two or more parts, no apparent change in the intimate structure taking place; or indirect, when a complicated series of changes in the structure of the nucleus precedes and follows its division (see CARYOCINESIS). In both forms of nuclear d. the d. of the entire cell usually follows that of the nucleus. If, however, cell-d. does not follow, the cell becomes multinucleated. [J.] Superior d. of the thalamus. The upper portion of the optic thalamus, which is figured by Meynert as composed of fibres derived from the medullary substance of the corresponding hemisphere. [1, 31; K.] Thalamic d. The portion of the isthmus cerebri belonging to the thalamencephalon. ["Med. Rec.," Oct. 11, 1884, p. 393 (K).] Thalamo-lenticular d. The posterior portion of the internal capsule of the brain. [" Med. Rec., Oct. 11, 1884, p. 393 (K).] [s. 602]