/ Dictionary / Index M malacology: Meaning and Definition of Find definitions for: mal•a•col•o•gy Pronunciation: (mal"u-kol'u-jē), [key] — n. the science dealing with the study of mollusks. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: malacology (Thesaurus) malaco- malacopterygian Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language