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The Collaborative International Dictionary
Karyokinesis

Karyokinesis \Kar"y*o*ki*ne`sis\ (k[a^]r`[i^]*[-o]*k[-i]*n[=e]"s[i^]s), n. [NL., fr. Gr. ka`ryon a nut, kernel + kinei^n to move.]

  1. (Biol.) The indirect division of cells in which, prior to division of the cell protoplasm, complicated changes take place in the nucleus, attended with movement of the nuclear fibrils; -- opposed to karyostenosis. The nucleus becomes enlarged and convoluted, and finally the threads are separated into two groups which ultimately become disconnected and constitute the daughter nuclei. Called also mitosis. See Cell development, under Cell.

  2. The changes that occur in the nucleus of a cell, especially movements of the chromosomes, in the process of cell division.

Wiktionary
karyokinesis

n. (context biology English) The process of change that takes place during the division of a cell nucleus at mitosis or meiosis.

WordNet
karyokinesis

n. organic process consisting of the division of the nucleus of a cell during mitosis or meiosis