a deflection in the path of a body moving in latitude relative to the Earth when observed from the Earth. The deflection is due to the Earth's rotation and is to the east when the motion is towards a pole
Coriolis effect in American English
(ˌkɔriˈoʊlɪs)
the apparent deflection of a moving mass of water, air, etc. to the right in the Northern Hemisphere and to the left in the Southern Hemisphere