/ Dictionary / Index H horology: Meaning and Definition of Find definitions for: ho•rol•o•gy Pronunciation: (hô-rol'u-jē, hō-), [key] — n. the art or science of making timepieces or of measuring time. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: horology (Thesaurus) horologium horopter Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language