Verb
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get worse or fall back to a previous condition
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go back over
"retrograde arguments"
- hash over -
move back
"The glacier retrogrades"
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move in a direction contrary to the usual one
"retrograding planets"
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move backward in an orbit, of celestial bodies
Adjective
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moving or directed or tending in a backward direction or contrary to a previous direction
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going from better to worse
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of amnesia
affecting time immediately preceding trauma
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moving from east to west on the celestial sphere
or--for planets--around the sun in a direction opposite to that of the Earth