1. the quality or state of being biconcave; the condition of having two concave surfaces
Usage: technical; commonly used in anatomy and optics

Examples

• The biconcavity of red blood cells allows them to deform and pass through narrow capillaries.
• A biconcave lens exhibits biconcavity on both of its surfaces.
• The biconcavity of certain vertebrae helps distribute pressure along the spine.
• Optical instruments often rely on the biconcavity of their lenses to focus light.
• The biconcavity of the lens makes it useful for diverging light rays.