Noun: middlebreaker
- Moldboard plough with a double moldboard designed to move dirt to either side of a central furrow
"The farmer used a middlebreaker plough to prepare the field for planting";
- lister, lister plow [N. Amer], lister plough [Brit, Cdn], middle buster
Derived forms: middlebreakers
Type of: moldboard plow [N. Amer], mouldboard plough [Brit, Cdn]