English

Noun

underpressure ‎(plural underpressures)

1. insufficient pressure; a marked drop in pressure
   • 2007, Vladimir A. Rakov and Martin A. Uman, Lightning: Physics and Effects, page 378

     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).

Antonyms

• overpressure

Translations