(from the article `harrow`) Modern harrows comprise several varieties. Disk harrows mount concave disks and are frequently referred to simply as disks. One type, the ...
[n] - a harrow with a series of disks set on edge at an angle
disc harrow noun a harrow with a series of disks set on edge at an angle
a harrow having a number of sharp-edged, concave disks set at such an angle that as the harrow is drawn along the ground they turn the soil, pulverize it, and destroy weeds.