a thin flat circular object
an apparently flat figure or surface, e.g. of a planet
the solar disc
a disk for a computer
dated a gramophone record
any of various round flat anatomical structures, esp any of the cartilaginous discs between the spinal vertebrae
any of the sharp-edged concave circular cutting blades of a harrow
the central part of the flower head of a plant such as the daisy, which is made up of many closely packed small tubular flowers
[Latin discus from Greek diskos disc, platter, discus]