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equa'tion move"ment



Horol.
a movement in certain clocks (equa'tion clock") for driving a hand (equa'tion hand") that shows the relation of the mean day of 24 hours to the length of the current solar day.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

equational verbequation of motion

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