/ Dictionary / Index H histology: Meaning and Definition of Find definitions for: his•tol•o•gy Pronunciation: (hi-stol'u-jē), [key] — n. the branch of biology dealing with the study of tissues. the structure, esp. the microscopic structure, of organic tissues. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: histology (Thesaurus) histologist histolysis Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language