disc

A thin, flat, circular plate or similar object.

A coin is a disc of metal.

An intervertebral disc.

Something resembling a disc.

Venus's disc cut off light from the Sun.

[A] peculiar luminous and sinuous marking appeared on the unillumined half of the inner planet, and almost simultaneously a faint dark mark of a similar sinuous character was detected upon a photograph of the Martian disc.

A vinyl phonograph or gramophone record.

Turn the disc over, after it has finished.

The flat surface of an organ, as a leaf, any flat, round growth.

To harrow with a disc harrow.

It is held that discing is as much value to lucerne as cultivation is to corn.

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.

In the air, the asymmetric drag generated by a discing propeller can result in loss of control of the airplane.

Acronym of dominance, inducement, submission, and compliance, a type of personality test.