brə̇ˈnel-, ˈbriˌn- noun
Usage: usually capitalized B
Etymology: after Johann A. Brinell died 1925 Swedish engineer
: the hardness of a metal or alloy measured by a manually operated vertical hydraulic press in which a hard steel or carbide ball of standard size (as 10 millimeters in diameter) is pressed with a standard load (as 3000 kilograms) into the specimen of metal or alloy under test, the resistance to penetration being expressed by a number denoting the applied load in kilograms divided by the spherical area of indentation in square millimeters