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microinstruction

[mahy-kroh-in-struhk-shuh n] /ˌmaɪ kroʊ ɪnˈstrʌk ʃən/
noun, Computers.
1.
an instruction that defines part of a machine-language instruction in terms of simpler operations.
Origin
1955-1960
1955-60; micro- + instruction
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for microinstruction

microinstruction

/ˈmaɪkrəʊɪnˌstrʌkʃən/
noun
1.
(computing) an instruction produced within an arithmetic and logic unit in accordance with a microprogram, that activates a particular circuit to perform part of the operation specified by a machine instruction
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
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Word Origin and History for microinstruction
n.

1959, from micro- + instruction.

Online Etymology Dictionary, © 2010 Douglas Harper
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