: a unit of pressure in the mks system equivalent to one newton per square meter or to 1.45 × 10−4 pounds per square inch
Biographical Note for PASCAL
Pas·cal\pȧs-kȧl\ , Blaise(1623–1662), French mathematician, physicist, and religious philosopher. A mathematical prodigy as a child, Pascal completed an original treatise on conic sections by the time he was 16. He undertook the study of geometry, hydrodynamics, and hydrostatic and atmospheric pressure. From 1651 to 1654 he composed treatises on the weight and density of air, on Pascal's triangle, and on the equilibrium of liquid solutions. In this last treatise he formulated Pascal's law of pressure. He is also credited with laying the foundations for the theory of probability. Pascal is a major figure in French literature and religious philosophy.
Unit of pressure, abbreviated Pa, in the International System of Units. Named for Blaise Pascal, the unit is a pressure of one newton per square meter (1 N/m2). It is inconveniently small for many purposes, and the kilopascal (kPa), 1,000 N/m2, is more commonly used in engineering work (1 lb per sq in. equals 6.895 kPa).