| A | B |
|---|
| Absorption | Ability of a substance to reduce the intensity of light radiation by converting the energy into another form. |
| Additive | Creating a three-dimensional |
| Axonometric | A drawing only partially to scale, used to describe a method of drawings a three-dimensional object so that the vertical and horizontal axes are drawn to scale, but the curves and diagonals appear distorted. |
| Color | The aspects of objects and light sources that may be described in terms of hue, lightness and saturation for objects and hue, brightness and saturation for light sources. |
| Converge | In a perspective drawing, the effect when parallel lines appear to come together in the distance. |
| Dark | Devoid, or partially devoid, of light. Not reflectiong. |
| Diametric | A drawing projected so that the plane of projection of a three-dimensional drawing is at an equal angle to two of the three axes of the object. |
| Diminution | Objects further away appear smaller. |
| Gesture Study | A sketch that captures the essence of shape. |
| Ground Line | In a perspective drawing, the plane where objects appear to rest. |
| Horizon Lines | In a perspective drawing, the imaginary line at eye level used as a construction line. |
| Hue | The graduation of color. The attribute of colors that permit them to be classed as red, yellow, green, blue or an intermediate color between any contiguous pair of these colors. |
| Isometric | A drawing projected so tha the plane of projection of a three-dimensional drawing forms equal angles (102 degrees) to each of the three axes of the object. |
| Isometric Axis | The axis representing height, width and depth for an isometric drawing. |
| Light | A quality of brighness. |
| Mass | The property of an object that is a measure of its inertis, the amount of matter it contains, and its influence in a gravitational field. |
| Negative Space | Created by the boundaries of space within an object. |
| Oblique | A form of pictorial sketch in which two axes are at right angles to each other (one vertical, one horizontal) and the depth axis is at an obliques angle. |
| One Point Perspective | A perspective drawing using one vanishing point. |
| Perspective | A view of an object created with one or more points vanishing to the horizon. |
| Picture Plane | In a perspective drawing, it is the plane of projection. |
| Primary Color | One of the three basic colors of the spectrum, red, yellow, or blue, from which all other colors can be blended. Any one of the three basic colors cyan, magenta, or yellow, which when subtracted from white can produce all other colors. |
| Projection Plane | An imaginary plane in the line of sight on which an image appears. |
| Proportion | A Principle of Design. Comparative relationships between things with repect to size. |
| Render | To create an artistic representation of an object. |
| Saturation | Chromatic purity. Freedon from dilution with white. |
| Saturation Point | The point at which no more can be absorbed or assimilated. |
| Shade | A color mixed with black to absorb more light. |
| Shading | An area of relatively dark tones or close lines, dots, or hatch marks that produces darkness or shadow in a drawing or picture. |
| Spatial (Spacial) Relations | The relative position and size of objects in three-dimensional environment. |
| Spectrum | A continuum of color formed whena a beam of white light is dispersed (as by passage througha prism) so that its component wavelenghts are arranged in order. |
| Subtractive | Creating a three-dimensional shape by subtracting, or removing, shapes/mass from the model. |
| Tint | A color mixed with white to give low saturation and high lightness. |
| Trimetric | A drawing projected so that the plane of projection of a three-dimensional drawing is at a different angle to all three axes of the object. |
| Two Point Perspective | Drawing using vertical lines and two vanishing points. |
| Value | The lightness or darkness of a color. |
| Vanishing Point | The point on the horizon where parallel objects appear to intersect due to convergence. |
| Wavelengths | The distance from the start of one wave to the start of the next. |
