DICT.TW Dictionary Taiwan

 Per·spec·tive, n.
 1. A glass through which objects are viewed. [Obs.] “Not a perspective, but a mirror.”
 2. That which is seen through an opening; a view; a vista. “The perspective of life.”
 3. The effect of distance upon the appearance of objects, by means of which the eye recognizes them as being at a more or less measurable distance. Hence, aërial perspective, the assumed greater vagueness or uncertainty of outline in distant objects.
    Aërial perspective is the expression of space by any means whatsoever, sharpness of edge, vividness of color, etc.   --Ruskin.
 4. The art and the science of so delineating objects that they shall seem to grow smaller as they recede from the eye; -- called also linear perspective.
 5. A drawing in linear perspective.
 Isometrical perspective, an inaccurate term for a mechanical way of representing objects in the direction of the diagonal of a cube.
 Perspective glass, a telescope which shows objects in the right position.
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 I·so·met·ric I·so·met·ric·al a.
 1. Pertaining to, or characterized by, equality of measure.
 2. Crystallog. Noting, or conforming to, that system of crystallization in which the three axes are of equal length and at right angles to each other; monometric; regular; 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 single plane of projection is used. It is so named from the fact that the projections of three equal lines, parallel respectively to three rectangular axes, are equal to one another. This kind of projection is principally used in delineating buildings or machinery, in which the principal lines are parallel to three rectangular axes, and the principal planes are parallel to three rectangular planes passing through the three axes.
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