adjective
- curved inward on both sides or surfaces
Usage: commonly used in optics and biology
Examples
- A biconcave lens is thinner in the middle and thicker at the edges.
- Red blood cells have a biconcave shape that helps them carry oxygen efficiently.
- The biconcave mirror reflects light in a diverging pattern.
- Biconcave lenses are used in eyeglasses to correct nearsightedness.
- The biconcave surface of the lens causes light rays to spread apart.