underpressure

listen to the pronunciation of underpressure
İngilizce - Türkçe
depresyon
İngilizce - İngilizce
insufficient pressure; a marked drop in pressure

The expanding-hot-channel mechanism predicts an initial positive pressure change (an overpressure) while the electrostatic-pressure-relief mechanism predicts an initial negative pressure change (an underpressure).

underpressure