Dictionary
Vick'ers num"ber
Metall.
a numerical expression of the hardness of a metal as determined by a test
(Vick'ers test") in which the sample is indented under a known pressure by the point of a diamond and the surface area of the indentation is divided into the amount of pressure applied.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.