disc
A thin, flat, circular plate or similar object.
(anatomy) An intervertebral disc.
Something resembling a disc.
A vinyl phonograph / gramophone record.
(botany) The flat surface of an organ, as a leaf, any flat, round growth.
(disc sports) Generic name for the trademark Frisbee.
(agriculture) To harrow with a disc harrow.
(aviation, of a propeller) To move towards, or operate at, zero blade pitch, orienting the propeller blades face-on to the oncoming airflow and maximizing the drag generated by the propeller.