Something that compacts things (e.g. trash). / One who makes a compact or agreement.

plural of compaction

plural of compactization

The clumping of chromosomes or other forms of DNA

plural of compactivity

plural of compactibility

The condition of being compactable

A kind of optical disc used to store audio or other data.

A form of digital media on a plastic disc read by a laser in a CD drive. It comes in several varieties including CD-ROM, CD-R, and CD-RW.

(mathematics) Any topological subset of Euclidean space that is a compact set