The force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit)
Applicable units are those of quantitykind:ForcePerArea
http://www.thefreedictionary.com/force+per+unit+area
http://en.wikipedia.org/wiki/Pressure
The force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit)