Noun: disc plowUsage: N. Amer (elsewhere: disc plough)- A plow that consists of a gang of concave steel cutting disks, used for work in hard dry soils
"The farmer used a disc plow to break up the compacted soil";
- disc plough [Brit]
Type of: moldboard plow [N. Amer], mouldboard plough [Brit, Cdn]