di·a·ki·ne·sis 
(dī′ə-kə-nēsĭs, -kī-)
(dī′ə-kə-nēsĭs, -kī-)n. pl. di·a·ki·ne·ses (-sēz)
The final stage of the prophase in meiosis, characterized by shortening and thickening of the paired chromosomes, formation of the spindle fibers, disappearance of the nucleolus, and degeneration of the nuclear membrane.
di′a·ki·netic (-nĕtĭk) adj.