| ADIACTINIC | • adiactinic adj. (Chemistry) Not transmitting the actinic rays. • ADIACTINIC adj. denoting a substance that does not transmit radiation affecting photochemically sensitive materials, such as a safelight in a photographic darkroom. |
| DIACAUSTIC | • diacaustic adj. Relating to the caustic curves formed by the refraction of light. • diacaustic n. A refracting lens, which can be used to cauterise. • diacaustic n. The curve or surface formed by the intersection of refracted light rays. |
| DIACHRONIC | • diachronic adj. Occurring over or changing with time. • diachronic adj. Of, pertaining to or concerned with changes that occur over time. • DIACHRONIC adj. of the study of a subject (esp. a language) through its historical development, as opposed to synchronic. |
| DIACHYLONS | • diachylons n. Plural of diachylon. • DIACHYLON n. formerly a plaster of plant juices; now lead-plaster, also DIACHYLUM. |
| DIACHYLUMS | • DIACHYLUM n. formerly a plaster of plant juices; now lead-plaster, also DIACHYLON. |
| DIACODIONS | • diacodions n. Plural of diacodion. • DIACODION n. (obsolete) a syrup of poppies, also DIACODIUM. |
| DIACODIUMS | • diacodiums n. Plural of diacodium. • DIACODIUM n. (obsolete) a syrup of poppies, also DIACODION. |
| DIACONATES | • diaconates n. Plural of diaconate. • DIACONATE n. the office of a deacon. |
| DIACONICON | • diaconicon n. A sacristy for sacred vessels in a Greek church, on the south side of the bema or sanctuary. • DIACONICON n. a sacristy for sacred vessels in Orthodox churches. |
| DIACOUSTIC | • diacoustic adj. Relating to diacoustics. • DIACOUSTIC adj. pertaining to the refraction of sound. |
| DIACRITICS | • diacritics n. Plural of diacritic. • DIACRITIC n. a mark or sign serving to distinguish different values or sounds of the same letter e.g. an acute accent. |
| DIACTINISM | • DIACTINISM n. the ability to transmit photochemically active radiation. |
| EPICARDIAC | • epicardiac adj. (Anatomy) Of or relating to the epicardium. • EPICARDIAC adj. relating to the epicardium, that part of the pericardium which forms the outer surface of the heart, also EPICARDIAL. |
| NONCARDIAC | • noncardiac adj. Not cardiac; not related to the heart. • NONCARDIAC adj. not related to the heart. |