1. (

• meniscus ,
• semilunar_cartilage

) (anatomy) a disk of cartilage that serves as a cushion between the ends of bones that meet at a joint ;

2. (

• meniscus ,

) (optics) a lens that is concave on one side and convex on the other ;

3. (

• meniscus

) (physics) the curved upper surface of a nonturbulent liquid in a vertical tube ;