Lüders' line
noun
Lü·ders' line
variants or less commonly Lueders' line
ˈlü|də(r)z-,
ˈlē|
: a line or any of a definite system of line markings appearing on the smooth surface of tough material (as metal) strained beyond its elastic limit and caused by flow of the material
Word History
Etymology
after W. Lüders, flourished 1859 German scientist, its discoverer