[1] it comes from the greek word μικρός (mikrós), meaning small. The economy's performance at the micro level. The meaning of micro is very small
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Add to word list very small
A microbrewery (definition of micro from the cambridge academic content dictionary © cambridge university press)
Micro is a si unit prefix in the metric system denoting a factor of 10⁻⁶ (one millionth) It is represented by the prefix micro or the symbol µ.