present participle of retrograde

Directed or moving backwards in relation to the normal or previous direction of travel; retreating. / Reverting to an inferior or less developed state; declining, regressing.

In a reverse direction; backwards.

A movement backwards or opposite to the intended or normal motion. / (astrology) The apparent movement of a planet across the sky in the opposite direction from its ordinary movement.

(geography) To cause (a land feature such as a coastline or waterfall) to undergo retrogradation, that is, to travel in the direction of the land or upstream due to erosion.

plural of retrograde

simple past tense and past participle of retrograde

Motion in a retrograde manner. / Decline, degradation.

plural of retrogradation

(sciences) With a backward motion