amitosis
noun
ami·to·sis ˌā-mī-ˈtō-səs 
: cell division by simple cleavage of the nucleus and division of the cytoplasm without spindle formation or appearance of chromosomes
amitotic
ˌā-mī-ˈtä-tik
adjective amitotically
ˌā-mī-ˈtä-ti-k(ə-)lē
adverb 
Word History
Etymology
a- entry 2 + mitosis, after amitotic, borrowed from German amitotisch
First Known Use
1888, in the meaning defined above
Medical Definition
amitosis
noun
ami·to·sis ˌā-mī-ˈtō-səs
plural amitoses -ˌsēz
: cell division by simple cleavage of the nucleus and division of the cytoplasm without spindle formation or appearance of chromosomes
called also direct cell division