| DIACAUSTICS | • diacaustics n. Plural of diacaustic. • DIACAUSTIC n. a type of curve formed by refraction. |
| DIACHRONIES | • diachronies n. Plural of diachrony. • DIACHRONY n. the historical development of a language etc. |
| DIACHRONISM | • DIACHRONISM n. the study of a subject, esp. a language, through its historical development. |
| DIACHRONOUS | • diachronous adj. (Geology) Varying in age from place to place. • diachronous adj. Alternative form of diachronic. • DIACHRONOUS adj. relating to the study of a language through its development. |
| DIACONICONS | • DIACONICON n. a sacristy for sacred vessels in Orthodox churches. |
| DIACOUSTICS | • diacoustics n. The science concerned with the properties of sound as affected by passing through different mediums; diaphonics. • DIACOUSTICS n. the branch of physics that deals with refracted sound. |
| DIACRITICAL | • diacritical adj. Capable of distinguishing or of making a distinction. • diacritical adj. Of, pertaining to, or serving as a diacritic. • diacritical n. A diacritic (mark). |
| DIACTINISMS | • DIACTINISM n. the ability to transmit photochemically active radiation. |
| ENDOCARDIAC | • endocardiac adj. Relating to the endocardium. • endocardiac adj. (Medicine) Seated or generated within the heart. • ENDOCARDIAC adj. relating to the endocardium, a membrane lining the heart cavities, also ENDOCARDIAL. |
| IMMEDIACIES | • immediacies n. Plural of immediacy. • IMMEDIACY n. the quality of being immediate. |
| PERICARDIAC | • pericardiac adj. Alternative form of pericardial. • PERICARDIAC adj. relating to the pericardium, a membranous sac containing the heart, also PERICARDIAL, PERICARDIAN. |
| SUBDIACONAL | • subdiaconal adj. Relating to a subdeacon. • SUBDIACONAL adj. relating to a subdeacon. |
| ZYGOCARDIAC | • zygocardiac adj. (Anatomy) Yoke-like and cardiac; applied to an ossicle of the stomach of some crustaceans. • ZYGOCARDIAC adj. denoting certain paired lateral ossicles in the gastric mill of Crustacea. |