mə̇ˈniskəs noun
( plural menis·ci -iˌskī, -iˌsī ; also meniscus·es )
Usage: often attributive
Etymology: New Latin, from Greek mēniskos, diminutive of mēnē moon — more at moon
1. : a crescent or crescent-shaped body : a crescent moon
2. : a fibrocartilage within a joint especially of the knee
3. : a concavo-convex lens ; especially : one of true crescent-shaped section
4. : the curved upper surface of a liquid column that is concave when the containing walls are wetted by the liquid and convex when not