Difference between Harrow and Disk

Harrow

Part of speech: verb

Definition: To drag a harrow over; to break up with a harrow. To traumatize or disturb; to frighten or torment.

Part of speech: noun

Definition: A device consisting of a heavy framework having several disks or teeth in a row, which is dragged across ploughed land to smooth or break up the soil, to remove weeds or cover seeds; a harrow plow.

Disk

Part of speech: noun

Definition: A thin, flat, circular plate or similar object.Something resembling a disk.A vinyl phonograph/gramophone record.A floppy disk - removable magnetic medium or a hard disk - fixed, persistent digital storage.A disc - either a CD-ROM, an audio CD, a DVD or similar removable storage medium.

Example sentence: Every type of ring behavior we have seen around Jupiter, Uranus, or Neptune can be found in orbit around Saturn. And Saturn's ring system offers the greatest promise of understanding processes in operation within all disk systems, not just those found around planets.