Diagometer, dī-a-gom′e-tėr, n. a form of electroscope for ascertaining conducting power. [Gr. diagein, to conduct, metron, a measure.]
Diagonal, dī-ag′o-nal, adj. through the corners, or from an angle to an opposite angle of a four or many sided figure.—n. a straight line so drawn.—adv. Diag′onally.—Diagonal scale, a scale for laying down small fractions of the unit of measurement, the parallel lines drawn lengthwise on its surface being divided into sections by lines drawn crosswise, and in one end section being intersected by a series of other parallel lines drawn obliquely at equal distances across them. [Fr.,—L. diagonalis, from Gr. diagōnios—dia, through, and gōnia, a corner.]
Diagram, dī′a-gram, n. a figure or plan drawn in outline to illustrate any statement: a record traced by an automatic indicator.—adj. Diagrammat′ic.—adv. Diagrammat′ically.—n. Dī′agraph, an instrument for enabling unskilled persons to draw objects in outline.—adj. Diagraph′ic. [L.,—Gr. diagramma—dia, round, graphein, to write.]
Diaheliotropic, dī-a-hē-li-ō-trop′ik, adj. (bot.) turning transversely to the light.—n. Diaheliot′ropism. [Gr. dia, across, and heliotropic.]
Dial, dī′al, n. an instrument for showing the time of day by the sun's shadow: a timepiece: the face of a watch or clock: a circular plate on which a movable index shows the degree of pressure, &c.—v.t. to measure, as with a dial.—ns. Dī′alist, a maker of dials: one skilled in dialling; Dī′alling, the art of constructing dials: the science which explains the measuring of time by the sun-dial: surveying by help of a compass with sights, such as is called a 'miner's dial;' Dīal-plate. [M. E. dial—Low L. dialis, daily—L. dies, a day.]
Dialect, dī′a-lekt, n. a variety or form of a language peculiar to a district: a non-literary vernacular: a peculiar manner of speaking.—adj. Dialect′al.—adv. Dialect′ally.—ns. Dialect′icism; Dialectol′ogist; Dialectol′ogy. [Through Fr. and L. from Gr. dialektos, speech, manner of speech, peculiarity of speech—dia, between, legein, to speak.]
Dialectic, -al, dī-a-lek′tik, -al, adj. pertaining to dialect or to discourse: pertaining to dialectics: logical.—ns. Dialec′tic, Dialect′ics, art of discussing: that branch of logic which teaches the rules and modes of reasoning.—adv. Dialec′tically.—n. Dialecti′cian, one skilled in dialectics, a logician. [Gr. dialektikos.]
Diallage, dī-al′a-jē, n. (rhet.) a figure of speech by which arguments, after having been considered from various points of view, are all brought to bear upon one point. [Gr.]
Diallage, dī′al-āj, n. a mineral nearly allied to augite, brown, gray, or green in colour, laminated in structure, with a metallic lustre when broken across.—adjs. Diallag′ic, Dial′lagoid. [Gr. diallagē, change—dia, between, allassein, to change—allos, other.]
Dialogite, dī-al′ō-jīt, n. a rose-red carbonate of manganese—also Rhodochrosite.