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Retrograde may refer to:

Retrograde

• Retrograde motion, in astronomy, describes retrograde motions of celestial bodies relative to a gravitationally central object
• Apparent retrograde motion, in astronomy, is the apparent motion of planets as observed from a particular vantage point
• Retrograde metamorphism, in geology, describes a somewhat rare recrystalization of rocks under decreasing pressure and/or temperature conditions
• Retrograde ejaculation, in medicine
• Retrograde amnesia, in neuroscience / medicine, is a type of amnesia
• Retrograde signaling, in neuroscience
• Retrograde, a type of musical permutation
• Retrograde, in politics, describes an ideology opposed to progressivism
• Retrograde analysis, in chess problems
• Retrograde (videogame), in entertainment, is shooter published in 1989 by Thalamus on Commodore64
• Retro/Grade, in entertainment, is a music video game under development for the Playstation 3 by 24 Caret Games

Retrogradation

• Retrogradation is landward change in position of the front of a river delta with time.
• Retrogradation (starch) takes place in gelatinized starch when the amylose and amylopectin chains realign themselves, causing the liquid to gel.

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From LoveToKnow 1911