| Term | Definition |
|---|---|
| Dado | Dado – The lower part of an interior wall, which has been treated with decoration. |
| Dentils | Dentils – A small square block used in series in Ionic, Corinthian, Composite, and, more rarely, Doric cornices. |
| Descriptive Specification | Descriptive Specification – Describes, often in intricate detail, the materials, workmanship, manufacture methods, and installation of the obligatory goods. |
| Design Development Phase | Design Development Phase – Involves the preparation of all final plans, presentation graphics, and specifications required to explain design concepts to the client. |
| Dichroic Glass | Dichroic Glass – A thin metallic coating on any type of glass. This coating is applied at a high temperature in a vacuum chamber. |
| Die Forming | Die Forming – The process of placing metal between two steel dies or stamps and squeezing them together under high pressure. The process shapes and strengthens the metal. |
| Digital Imaging | Digital Imaging – Refers to the creation, manipulation, and production of images by use of computer technology, including software printers. |
| Diptych | Diptych – Artwork on two panels that are hung together. Historically, a hinged, two-paneled painting or bas-relief. |
| Direct Labor | Direct Labor – The time the various employees spend directly involved in the generation of the revenues of the firm. |
| Doric | Doric – Featuring a fluted, tapered shaft and a square abacus capital, the Doric column is the simplest of the architectural orders. |
| Double-Hung Window | Double-Hung Window – A window with two vertical sliding sashes, that can be raised and lowered independently of each other. |
| Dovetail joint | Dovetail joint – A joint where a mortise and tenon combine to form a solid structure. Created entirely from wood. |
| Drapery | Drapery – One of the most common types of window covering in residential and commercial interiors. |
| Dyke | Dyke – An igneous intrusion, rather like a wall, into the surrounding rocks. |