# isometric drawing

isometric drawing
also called  isometric projection

method of graphic representation of three-dimensional objects, used by engineers, technical illustrators, and, occasionally, architects. The technique is intended to combine the illusion of depth, as in a perspective rendering, with the undistorted presentation of the object's principal dimensions, that is, those parallel to a chosen set of three mutually perpendicular coordinate axes.

The isometric is one class of orthographic projections. (In making an orthographic projection, any point in the object is mapped onto the drawing by dropping a perpendicular from that point to the plane of the drawing.) An isometric projection results if the plane is oriented so that it makes equal angles (hence “isometric,” or “equal measure”) with the three principal planes of the object. Thus, in an isometric drawing of a cube, the three visible faces appear as equilateral parallelograms; that is, while all of the parallel edges of the cube are projected as parallel lines, the horizontal edges are drawn at an angle (usually 30°) from the normal horizontal axes, and the vertical edges, which are parallel to the principal axes, appear in their true proportions.

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Universalium. 2010.

### Look at other dictionaries:

• isometric drawing — noun : the representation of an object on a single plane (as a sheet of paper) with the object placed as in isometric projection but disregarding the foreshortening of the edges parallel to the three prinicpal axes of the typical rectangular… …   Useful english dictionary

• isometric — isometrically, adv. /uy seuh me trik/, adj. Also, isometrical. 1. of, pertaining to, or having equality of measure. 2. of or pertaining to isometric exercise. 3. Crystall. noting or pertaining to that system of crystallization that is… …   Universalium

• isometric — i•so•met•ric [[t]ˌaɪ səˈmɛ trɪk[/t]] adj. Also, i so•met′ri•cal. 1) math. of, pertaining to, or having equality of measure 2) cvb of or pertaining to isometric exercise 3) cry noting or pertaining to a system of crystallization that is… …   From formal English to slang

• Isometric projection — is a form of graphical projection more specifically, an axonometric projection. It is a method of visually representing three dimensional objects in two dimensions, in which the three coordinate axes appear equally foreshortened and the angles… …   Wikipedia

• isometric — 1840, lit. of the same measure, coined from Gk. isos equal + metron measure (see METER (Cf. meter) (n.2)). Originally a method of using perspective in drawing; the physiological sense relating to muscular action is from 1891, borrowed from Ger.… …   Etymology dictionary

• isometric — ► ADJECTIVE 1) having equal dimensions. 2) Physiology involving an increase in muscle tension without contraction. 3) (of perspective drawing) in which the three principal dimensions are represented by axes 120° apart. DERIVATIVES isometrically… …   English terms dictionary

• drawing — I (New American Roget s College Thesaurus) n. picture, sketch, plan; delineation. See painting. drawing card II (Roget s IV) n. 1. [The practice or study of drawing] Syn. sketching, design, illustration, representation, rendering, tracing,… …   English dictionary for students

• isometric projection — noun : an axonometric projection in which the three spatial axes of the object are represented as equally inclined to the drawing surface and equal distances along the axes are drawn equal * * * isometric projection, the projection of an object… …   Useful english dictionary

• isometric — [ˌʌɪsəʊ mɛtrɪk] adjective 1》 of or having equal dimensions. 2》 Physiology (of muscular action) in which tension is developed without contraction. 3》 denoting a method of perspective drawing in which the three principal dimensions are represented… …   English new terms dictionary

• isometric — /aɪsəˈmɛtrɪk / (say uysuh metrik) adjective Also, isometrical. 1. relating to or having equality of measure. 2. a. relating to increased muscle activity which does not involve shortening of the muscle. b. relating to exercises involving such… …