Noun
microinstruction (plural microinstructions)
(computing) A hardware instruction in the CPU of a microprocessor; a software instruction in a microprogram
Consequently, each horizontal microinstruction is wider (contains more bits) and occupies more storage space than a vertical microinstruction. Source: Internet
For each tick it is common to find that only some portions of the CPU are used, with the remaining groups of bits in the microinstruction being no-ops. Source: Internet
This is very similar to the way CPUs with microcode execute one microinstruction per cycle. Source: Internet