/ məˈnɪskəs; NAmE / noun ( pl. me·nisci / -saɪ; NAmE /)
1.
( physics ) the curved surface of a liquid in a tube
2.
( anatomy ) a thin layer of cartilage between the surfaces of some joints, for example the knee
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WORD ORIGIN
late 17th cent.: modern Latin , from Greek mēniskos crescent, diminutive of mēnē moon.