/ Dictionary / Index I interfacial tension: Meaning and Definition of Find definitions for: in'terfa'cial ten'sion Pronunciation: [key] — Physical Chem. Physical Chem. the surface tension at the interface of two liquids. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. interfacial interfacing Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language