/ Dictionary / Index A amitosis: Meaning and Definition of Find definitions for: am•i•to•sis Pronunciation: (am"i-tō'sis, ā"mī-), [key] — n. Biol. the direct method of cell division, characterized by simple cleavage of the nucleus without the formation of chromosomes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: amitosis (Thesaurus) amitate amitriptyline Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language