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time reversal

noun Physics.

the mathematical operation of reversing the direction of time. Symbol: T

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You may have read the word "simmer" in a recipe or two, but what does it really mean?
To cook in water that begins cold and then reaches a boil.
To stew in a sauce for a long time.
To cook in water, just below boiling temperature.
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Origin of time reversal

First recorded in 1920–25

Words nearby time reversal

timepiece, timepleaser, time-poor, timer, time-release, time reversal, times, timesaving, timescale, time-sensitive, time series
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Scientific definitions for time reversal

time reversal

A mathematical operation on the description of a physical system in which the signs of variables representing time are reversed. Also called time conjugation See more at invariance.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.