a unit of atmospheric pressure equal to the pressure of a force of 133.322 pascals (1.33322 millibars or one millimeter of mercury or atmosphere)
Origin of torrafter E. Torricelli
nounpl. Torr torr
A unit of pressure that is equal to approximately 1.316 × 10−3 atmosphere or 133.3 pascals.
Origin of torrAfter Evangelista Torricelli.
Named for Evangelista Torricelli, an Italian physicist