seconds pendulum
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seconds pendulum
[′sek·əns ‚pen·jə·ləm] (horology)
A pendulum measuring 99.353 centimeters between its center of suspension and center of oscillation, and which requires exactly 1 second to swing from one side to another at sea level and 45° latitude.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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