Try Our Apps


Supposedly vs. Supposably

Rockwell number

noun, Metallurgy
a numerical expression of the hardness of a metal as determined by a test (Rockwell test) made by indenting a test piece with a Brale, or with a steel ball of specific diameter, under two successive loads and measuring the resulting permanent indentation.
Origin of Rockwell number
1930-35, Americanism; named after Stanley P. Rockwell, 20th-century American metallurgist Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source

Word of the Day

Difficulty index for Rockwell number

Few English speakers likely know this word

Word Value for rockwell

Scrabble Words With Friends