Orbital motion in the same direction as the primary's rotation.
In the normal direction of flow. ... (05 Mar 2000) ... 
Orbit in which the spacecraft moves in the same direction as the planet rotates. See retrograde. 
Type: Term Pronunciation: prō′grād Definitions: 1. In the normal direction of flow, in contrast with retrograde.
A succession of metamorphic conditions, each of which is at a higher temperature and/or pressure than the preceding one.