Concave can be categorized as an adjective and a verb.
Adjective |
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| concave - curving inward | ||
Verb |
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| concave - To render concave, or increase the degree of concavity. | ||
Noun |
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| concave - A concave surface or curve. | ||
| concave - The vault of the sky. | ||
| concave - One of the celestial spheres of the Ptolemaic or geocentric model of the world. | ||
| concave - An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting. | ||
| concave - An indentation running along the base of a surfboard, intended to increase lift. | ||
| concave - An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength. |
| # | Sentence | ||
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| 1. | adj. | The moon's orbit is always concave toward the sun. |
| Sentence | |
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| adj. | |
| The moon's orbit is always concave toward the sun. | |