"menisci" in the noun sense
1. meniscus, semilunar cartilage
anatomy) a disk of cartilage that serves as a cushion between the ends of bones that meet at a joint
optics) a lens that is concave on one side and convex on the other
physics) the curved upper surface of a nonturbulent liquid in a vertical tube
Source: WordNet® (An amazing lexical database of English)
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