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Comprehensive
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food group any group of foods organized by nutritional properties, esp. one incorporated into the food pyramid, such as grains, vegetables, fruits, fats, dairy, or protein.
frustum the part of a cone, pyramid, or other solid figure contained between two usu. parallel planes. [1/2 definitions]
Great Pyramid of Giza a limestone and granite pyramid, which is the oldest and only remaining of the Seven Wonders of the Ancient World, built circa 2500 B.C.E. as a memorial and tomb for King Khufu, the second king of the fourth Egyptian dynasty.
obelisk a tall stone shaft with four inclined sides and a pyramid-shaped point at the top. [1/2 definitions]
pyramid a solid figure whose sides are triangles that meet at a single point. The base of a pyramid can be any flat shape with straight sides, such as a triangle or square. [4/3 definitions]
pyramidal of, concerning, or resembling a pyramid.
tetrahedron a solid figure formed by four triangular faces; triangular pyramid.