aspherical
/eɪˈsfɛrɪkəl/
adjective
- Not shaped like a perfect sphere; having a curved surface that is not part of a sphere, often used in optics to reduce distortion.
- The eyeglasses use an aspherical design to make them thinner and lighter.
- The engineer explained how an aspherical shape improves the performance of the projector.
- Aspherical mirrors in the headlights help spread light more evenly on the road.
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