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Meaning of mesopeak

mes•o•peak

Pronunciation: (mez'u-pēk", mes'-, mē'zu-, -su-), [key]
— n.
  1. the level of maximum temperature in the mesophere, at an altitude of about 30 mi. (48 km).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.