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frustum"remaining piece after a part has been cut off," 1650s, in mathematics, from Latin frustum "piece broken off," from PIE *bhrus-to-, from root *bhreu- "to cut, break up" ( [..]
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frustumthe part of a solid between two parallel planes cutting through it.
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frustum(n) a truncated cone or pyramid; the part that is left when a cone or pyramid is cut by a plane parallel to the base and the apical part is removed
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frustum A truncated pyramid; that is, a pyramid from which the top has been cut off. In OpenGL 1.1, the view volume for a perspective projection is a frustum.
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frustumSee Cone and Pyramid.
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