/ Dictionary / Index A autosome: Meaning and Definition of Find definitions for: au•to•some Pronunciation: (ô'tu-sōm"), [key] — n. Genetics. any chromosome other than a sex chromosome. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: autosome (Thesaurus) autosexing autostability Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language