| Design Foundation | Rev 12 Sep 99 |

Glossary

haptic

Of or relating to the sense of touch; tactile.

hue

n. 1. The property of colors by which they can be perceived as ranging from red through yellow, green, and blue, as determined by the dominant wavelength of the light. 2. A particular gradation of color; a shade or tint. 3. Color: all the hues of the rainbow. 4. Appearance; aspect: a man of somber hue. 5. The H component of some color spaces (models) such as HSL, HLS, and HSV.

hyperbola

A curve formed by a section of a cone, when the cutting plane makes a greater angle with the base than the side of the cone makes. It is a plane curve such that the difference of the distances from any point of it to two fixed points, called foci, is equal to a given distance. See Focus. If the cutting plane be produced so as to cut the opposite cone, another curve will be formed, which is also an hyperbola. Both curves are regarded as branches of the same hyperbola.