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concave
[ adjective verb kon-keyv, kon-keyv; noun kon-keyv ]
adjective
- curved like a segment of the interior of a circle or hollow sphere; hollow and curved. Compare convex ( def 1 ).
- Geometry. (of a polygon) having at least one interior angle greater than 180°.
- Obsolete. hollow.
noun
- a concave surface, part, line, or thing.
- Machinery. a concave piece, as one against which a drum rotates.
verb (used with object)
- to make concave.
concave
/ ˈkɒnkeɪv; kɒnˈkeɪv /
adjective
- curving inwards
- physics having one or two surfaces curved or ground in the shape of a section of the interior of a sphere, paraboloid, etc
a concave lens
- maths (of a polygon) containing an interior angle greater than 180°
- an obsolete word for hollow
verb
- tr to make concave
concave
/ kŏn′kāv′ /
- Curved inward, like the inside of a circle or sphere.
Derived Forms
- ˈconcavely, adverb
- ˈconcaveness, noun
Other Words From
- con·cavely adverb
- con·caveness noun
- subcon·cave adjective
- subcon·cavely adverb
- subcon·caveness noun
Word History and Origins
Word History and Origins
Origin of concave1
Example Sentences
Sagging milk-filled breasts must appear perky; the once-swollen abdomen is made concave.
Ellis's patent boot studs to save the sole, and the Euknemida, or concave-convex fastening springs, are the latest novelties.
Lamb turned the paper over and winked at himself in the concave mirror of the semi-circle of bar.
The seat should slope downward a little toward the back, be slightly concave, and have rounded edges in front.
Of the two broader sides one was concave, the other convex; while of the narrower sides one was flat and the other indented.
His hair is long and black, and in his throat is a thick concave bone.
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