internal disunity; internal division; internal rift
nuclear fission; karyokinesis (division of a cell nucleus during mitosis or meiosis)
direct division (i.e. amitosis)
fundamental schism (between the early Sthaviravāda and Mahāsāṃghika Buddhist schools)
somatic cell division (i.e. mitosis)
split election (where two or more candidates from the same party stand)
meristematic tissue; meristem