Your request was meiscus which is probably a typo from meniscus.
meiscus -
Traditional English :: meniscus
meiscus - n. (pl. menisci) 1 Physics the curved upper surface of a liquid in a tube. 2 a lens that is convex on one side and concave on the other. 3 Math. a crescent-shaped figure.
meniscoid adj. [mod.L f. Gk meniskos crescent, dimin. of mene moon]