/ Dictionary / Index M Magnus effect: Meaning and Definition of Find definitions for: Mag'nus effect" Pronunciation: (mag'nus), [key] — Mech. Mech. the thrust on a cylinder rotating about its axis while in motion in a fluid, the thrust being perpendicular to the relative motion of the cylinder in the fluid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Magnus Annus* Magnus hitch Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language