A mechanical, geometrically-operating image scanning device, a fundamental component of early mechanical television.

(computing) A form of floppy disk whose head tracking was optically controlled (superseded by compact disc technology).

(biology) a small circular white spot on the surface of the yolk of an egg

A circular disk used to measure water transparency (and thus turbidity)

The cephalic disk of a rotifer, usually surrounded by a fringe of cilia.

A hypothetical megastructure in the form of a disk with a star located in a hole running through its axis, and massive enough to have its own atmosphere

plural of disk jockey

Alternative form of disc rot

Alternative form of parking disc

Synonym of ice circle