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Having an outline or surface that curves inward like the interior of a circle or sphere.Compare with convex (sense 1)
curved inwards, hollow, hollowed out, scooped out, depressed, sunkenView synonyms
- ‘If the outside edges appear to get sanded first, yet the middle part isn't affected, then you have a concave surface.’
- ‘The shape of each is similar, with a slightly concave surface, a rolled rim, and a high foot ring.’
- ‘The human shoulder blade is a thin triangle of bone with a thick crest along one edge, and a shallow, concave joint surface in one corner.’
- ‘The exterior walls were composed of concave and convex red bricks.’
- ‘You maintain your lower back curve, which is concave, by sitting straight in your chair.’
- ‘You stand in a dark room looking at a round concave surface perhaps five feet in diameter.’
- ‘Galileo's telescope had a convex object lens but a concave eye-piece.’
- ‘Choose only firm tubers and look for those with tiny sprouts showing on their upper, concave surfaces.’
- ‘Depressions are concave regions on protein surfaces that have no constriction at the mouth.’
- ‘This is a small group of specialized ellesmerocerids with a concave outline of siphuncle segments.’
- ‘The first surface of the head support arm is concave and the second surface of the head support arm is convex.’
- ‘It is possible to see the outline of a concave façade and shallow forecourt.’
- ‘As the enamel shrinks on melting and cools with a concave surface, more has to be poured in and the process repeated.’
- ‘The articular surface itself is concave, not convex as in many chelonioids.’
- ‘Above it, to signal the presence of occupied space, is a shallow concave circle dug out of the ground.’
- ‘Pictures of bound feet show the toes bent right under the sole, which is so curved it is concave.’
- ‘Similar double curvatures were used for concave lenses, and even more complicated corrections for astigmatism.’
- ‘McElwee contrasts convex and concave forms with building recesses and relief carvings.’
- ‘Its profile may show anything from a rather gentle concave upward curve to a series of complex scarps and sediment-filled basins.’
- ‘Where the old car had concave surfaces on the doors, the new doors swell outwards, lending more bulk to the profile.’
Late Middle English: from Latin concavus, from con- ‘together’ + cavus ‘hollow’.
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