<p><strong>Adjective</strong></p><ul><li>having the form of a discus or disk;<ul><li>flat and circular.</li></ul></li><li>(Botany) (of a composite flower) consisting of a disk only, without rays.</li></ul><p><strong>Noun</strong></p><ul><li>something in the form of a disk.</li><li>(Dentistry) an excavator with a disklike blade.</li></ul>