Mixed-member majoritarian representation

Mixed-member majoritarian representation (MMM) is type of a mixed electoral system (parallel voting) using winner-take-all and proportional methods to elect two different groups of members, where the disproportional results of the members elected by winner-take-all system are dominant over the members elected by the Proportional representation system. Mixed member majoritarian systems are therefore categorized under semi-proportional representation, and are usually contrasted with mixed-member proportional representation (MMP) which aims to provide proportional representation compensation ("top-up") seats.

Source: Wikipedia — Mixed-member majoritarian representation (CC BY-SA 4.0)