overpressure

from WordNet (r) 3.0 (2006)

overpressure
    n 1: a transient air pressure greater than the surrounding
         atmospheric pressure; "the overpressure of the blast kills
         by lethal concussion"

from The Collaborative International Dictionary of English v.0.48

Overpressure \O"ver*pres"sure\, n.
   Excessive pressure or urging. --London Athenaeum.
   [1913 Webster]

[email protected]