Meaning of Magnus effect

Mag'nus effect"

Pronunciation: (mag'nus), [key]
— Mech. Mech.
  1. 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.