/ Dictionary / Index H hull efficiency: Meaning and Definition of Find definitions for: hull' effi"ciency Pronunciation: [key] — Naval Archit. Naval Archit. the ratio of the quantity of work required to tow a certain hull at a given speed to that required to drive it with a certain propeller: used in propeller design. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hull balance hull girder Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language