concave - Hutchinson encyclopedia article about concave Printer Friendly
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concave

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concave

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°. Concave is the opposite of convex.
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? Mentioned in ? References in classic literature
 
Before again issuing from it, this spiral runs into a small cone with a concave base, that is turned downward in the shape of a spherical cap.
Five Weeks in a Balloon by Verne, Jules View in context
The city of Wintoncester, that fine old city, aforetime capital of Wessex, lay amidst its convex and concave downlands in all the brightness and warmth of a July morning.
Tess of the d'Urbervilles - A Pure Woman by Hardy, Thomas View in context
It terminated in a concave breast of rock, nearly vertical and destitute of vegetation.
Present At A Hanging And Other Ghost Stories by Bierce, Ambrose View in context
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