[mahy-kroh-in-struhk-shuh n] /ˌmaɪ kroʊ ɪnˈstrʌk ʃən/

noun, Computers.
an that defines part of a machine-language in terms of simpler operations.
(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

1959, from micro- + instruction.


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