<p><strong>noun</strong></p><ul><li>Optics: A transparent solid body, often having triangular bases, used for dispersing light into a spectrum or for reflecting rays of light.</li><li>Geometry: A solid having bases or ends that are parallel, congruent polygons and sides that are parallelograms.</li><li>Crystallography: A form having faces parallel to the vertical axis and intersecting the horizontal axes.</li></ul><p><strong>End of Response</strong></p>