/ Dictionary / Index E exobiology: Meaning and Definition of Find definitions for: ex•o•bi•ol•o•gy Pronunciation: (ek"sō-bī-ol'u-jē), [key] — n. the study of life beyond the earth's atmosphere, as on other planets. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: exobiology (Thesaurus) exo- exobiota Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language