[ peer-ee-od-ik, peer- ]
/ ˈpɪər iˈɒd ɪk, ˌpɪər- /
any motion that recurs in identical forms at equal intervals of time.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Science definitions for periodic motion
See harmonic motion.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.