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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012