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| a movement of atmospheric masses caused by the gravitational attraction of the sun and moon and by daily solar heating |
| any instrument that measures atmospheric pressure |
| 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. |