meniscus
/mɪˈnɪskəs/noun
(pl. menisci /-saɪ/)
1- Physics the curved upper surface of a liquid in a tube【物理】弯（月）液面。
1.1
- usu. as modifier a lens that is convex on one side and concave on the other弯月形透镜, 凹凸透镜。
1.2
- Anatomy a thin fibrous cartilage between the surfaces of some joints, e.g. the knee【剖】半月板。
词源
late 17th cent.: modern Latin, from Greek mēniskos 'crescent'， diminutive of mēnē 'moon'.