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microstructure

[mahy-kroh-struhk-cher]
noun Metallurgy.
  1. the structure of a metal or alloy as observed, after etching and polishing, under a high degree of magnification.
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Origin of microstructure

First recorded in 1880–85; micro- + structure
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for microstructure

microstructure

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