/ Dictionary / Index G gliosis: Meaning and Definition of Find definitions for: gli•o•sis Pronunciation: (glī-ō'sis), [key] an increase in the size and number of astrocytes of the brain. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. glioma glissade Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language