Karyostenosis

‖n. [ NL., fr. Gr. ka`ryon a nut, kernel + &unr_; a being straitened. ] (Biol.) Direct cell division (in which there is first a simple division of the nucleus, without any changes in its structure, followed by division of the protoplasm of the cell); -- in opposition to karyokinesis. [ 1913 Webster ]