Meteorology. the dissipation or decrease of a front or frontal zone.
Compare frontogenesis.

1935–40; fronto- + -lysis Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
frontolysis (frʌnˈtɒlɪsɪs)
meteorol the weakening or dissipation of a front

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
frontolysis   (frŭn-tŏl'ĭ-sĭs)  Pronunciation Key 
The weakening or complete dissipation of a meteorological front caused by a decrease in the horizontal thermal gradient (the difference in temperature of adjacent air masses) over time. Compare frontogenesis.
The American Heritage® Science Dictionary
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