Describing a lens or surface that is convex (bulging outward) on one side and concave (curving inward) on the other.
Convexo- (Latin convexus, convex) + concave (Latin concavus, hollow). A technical term formed by combining two opposite geometric properties, used in optics since the 1700s.
Your eyeglasses and camera lenses are often convexoconcave—one side bulges out, one curves in. This shape is perfect for focusing light because it combines both properties' strengths, which is elegant engineering based on ancient geometry.
Complete word intelligence in one call. Free tier — 50 lookups/day.