1. biconcave - Adjective
2. biconcave - Adjective Satellite
Concave on both sides; as, biconcave vertebrae.
Source: Webster's dictionaryBetween these articular surfaces is the articular disc (or meniscus), which is a biconcave, transversely oval disc composed of dense fibrous connective tissue. Source: Internet
A lens with two concave surfaces is biconcave (or just concave). Source: Internet
If the lens is biconcave or plano-concave, a collimated beam of light passing through the lens is diverged (spread); the lens is thus called a negative or diverging lens. Source: Internet
The broken pumice is clear and isotropic, and very small particles commonly have crescentic, sickle-shaped, or biconcave outlines, showing that they are produced by the shattering of a vesicular glass, sometimes described as ash-structure. Source: Internet