microstructure

[ mahy-kroh-struhk-cher ]
/ ˈmaɪ kroʊˌstrʌk tʃər /

noun Metallurgy.

the structure of a metal or alloy as observed, after etching and polishing, under a high degree of magnification.

Origin of microstructure

First recorded in 1880–85; micro- + structure

British Dictionary definitions for microstructure

microstructure
/ (ˈmaɪkrəʊˌstrʌktʃə) /

noun

structure on a microscopic scale, esp the structure of an alloy as observed by etching, polishing, and observation under a microscope