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Concave

  • Definition: Of a surface, curving inwards, or away from the eye. For example, a bowl appears concave when viewed from above. In geometry, a concave polygon is one that has an interior angle greater than 180 degree.

    Source: The Hutchinson Unabridged Encyclopedia with Atlas and Weather guide. Abington: Helicon, 2010. Credo Reference. Web.

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