plural of Poincaré disk

The hyperbolic plane, viewed as a disk so that Euclidean circles and lines Euclidean-perpendicular to the disk's surface are hyperbolic lines.

plural of Zip disk

(computing) A disk of the kind that can be read and written by a Zip drive.

plural of accretion disk

plural of Nipkow disk

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(computing) A form of floppy disk whose head tracking was optically controlled (superseded by compact disc technology).

plural of floptical disk

plural of germinal disk