Bearing or having disks; past tense of 'disk' as a verb, meaning to cut or shape with a disk harrow (a farm tool).
From disk + -ed suffix. 'Disk' comes from Latin discus and Greek diskos. The farming verb usage emerged when disk harrows became common agricultural equipment.
Farmers use 'disking' to break up soil, and the tool (a disk harrow) shares its name with computer storage disks—both are circular cutting or storing devices!
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