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A diagram or drawing; made to represent a magnitude or the relation of two or more magnitudes; a surface or space inclosed on all sides; -- called superficial when inclosed by lines, and solid when inclosed by surface; any arrangement made up of points, lines, angles, surfaces, etc.

The diagram or scheme of twelve houses or signs of the zodiac, into which the whole circuit of the heavens was divided for the purposes of such prediction of fortune.

Representing by means of pictures or diagrams; as, an icongraphic encyclopædia.

A line upon a thermodynamic diagram so drawn as to represent the pressures corresponding to changes of temperature when the volume of the gas operated on is constant. -- I`so*chor"ic (#), a.

bstance. Rankine. Isodiabatic lines or curves, a pair of lines or curves exhibiting, on a diagram of energy, the law of variation of the pressure and density of a fluid, the one during the lowering, and the other during the raising, of its temperature, when the quantity of heat given out by the fluid during any given s…

ar; cubic. Cf. Crystallization. Isometric lines (Thermodynamics), lines representing in a diagram the relations of pressure and temperature in a gas, when the volume remains constant. -- Isometrical perspective. See under Perspective. -- Isometrical projection, a species of orthographic projection, in which but a sin…

Having equal pressure. Isopiestic lines, lines showing, in a diagram, the relations of temperature and volume, when the elastic force is constant; -- called also isobars.

Of equal value. Isorropic line (in a diagram) (Geom.), the locus of all the points for which a specified function has a constant value. Newcomb.

An optical device for making an indicator diagram for high- speed engines. It consists of a light-tight box or camera having at one end a small convex mirror which reflects a beam of light on to the ground glass or photographic plate at the other end. The mirror is pivoted so that it can be moved in one direction by a…

ts is constant; -- so called from Cassini, who first investigated the curve. Thus, in the diagram, if P moves so that P A.P B is constant, the point P describes a Cassinian oval. The locus may consist of a single closed line, as shown by the dotted line, or of two equal ovals about the points A and B.…

eation of a horizontal section of anything, as of a building; a graphic representation; a diagram.

A plot; a plan; a design; a diagram; a map; a chart. [Obs. or Prov. Eng.] "To note all the islands, and to set them down in plat." Hakluyt.

Any lineal or mathematical diagram; an outline. To draw an exact scheme of Constantinople, or a map of France. South.

One who, or that which, signifies. In this diagram there was one significator which pressed remarkably upon our astrologer's attention. Sir W. Scott.

A photograph, map, or diagram of a spectrum.

oneness, or temperament, without constraint or external force. Romney Leigh, who lives by diagrams, And crosses not the spontaneities Of all his individual, personal life With formal universals. Mrs. Browning.

A diagram or picture which represents objects in such a way as to give the impression of relief or solidity; also, a stereograph.

The connection of two coils diagrammatically as a letter T, chiefly used as a connection for passing transformers. When the three free ends are connected to a source of three-phase current, two-phase current may be derived from the secondary circuits. The reverse arrangement may be used to transform from two-phase. --…