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diabetic of, having, or resulting from diabetes. [2 definitions]
diabolic of the Devil or a devil.
diabolical having qualities like those of the Devil or a devil; fiendish; malevolent.
diabolism worship of, or soliciting the help of, the devil or demons; Satanism. [2 definitions]
diachronic of or pertaining to changes that occur over time, as in languages. (Cf. synchronic.)
diaconal of or pertaining to a deacon or diaconate.
diaconate the rank, tenure, or office of a deacon. [2 definitions]
diacritic a diacritical mark.
diacritical serving to signal a difference or distinction. [2 definitions]
diacritical mark a small distinguishing mark, such as a macron, umlaut, or cedilla, that is added to a letter, esp. to indicate how it is to be pronounced.
diadem a crown or headband symbolizing royal status. [3 definitions]
diadromous veined in a fanlike pattern, as a leaf. [2 definitions]
diaeresis variant of dieresis.
diagnose to determine the identity of (a disease) by examination. [4 definitions]
diagnoseable combined form of diagnose.
diagnosis the act or process of finding out the nature of an illness or injury by examining its signs and symptoms. [4 definitions]
diagnostic of, concerning, or being a diagnosis. [3 definitions]
diagonal in mathematics, joining two nonadjacent corners of a polygon or two corners of a polyhedron that are not in the same plane. [5 definitions]
diagram a drawing, plan, or chart that makes clear the parts or workings of something. [4 definitions]
diagrammatic of or in the form of a diagram.
dial a disk or plate, usu. with numbers and a pointer indicating gradations of a measure such as speed, pressure, or the like. [8 definitions]