/ Dictionary / Index D differential compaction: Meaning and Definition of Find definitions for: differen'tial compac'tion Pronunciation: [key] — Geol. Geol. differences in the extent to which sediment is compacted owing to topographic irregularities of the surface on which it is deposited. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. differential coefficient differential equation Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language