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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.
diageotropic of, relating to, or being a plant organ that grows at a right angle to the line of gravity.
diageotropism the tendency of certain plant organs to grow at a right angle to the line of gravity.
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 lying in a slanting or oblique position. [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]
dial. abbreviation of "dialect."
dialect a variety of a language that is peculiar to a region, social class, or occupation and that differs from the standard language in pronunciation, usage, and vocabulary. [2 definitions]
dialectic of or relating to logical analysis and argumentation. [6 definitions]
dialectical of, involving, or by means of dialectic.
dialectical materialism a materialist philosophy and conception of history developed by Karl Marx and Friedrich Engels through their application of Hegel's dialectical method.
dialectician a person who applies or is skilled in dialectic.