MICRO- Meaning of MICRO- in English ■ combining form1》 small: microbrewery.↘of reduced or restricted size: microdot.2》 denoting a factor of one millionth (10 -6 ): microfarad. Originfrom Gk mikros 'small'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004