From The Collaborative International Dictionary of English v.0.44 [gcide]:
Meniscus \Me*nis"cus\, noun; pl. L. {Menisci} (-s[=i]), E. {Meniscuses}. [NL., from Gr. mhni'skos, dim. of mh'nh the moon.]
1. A crescent.
2. (Opt.) A lens convex on one side and concave on the other.
3. (Anat.) An interarticular synovial cartilage or membrane; esp., one of the intervertebral synovial disks in some parts of the vertebral column of birds.
{Converging meniscus}, {Diverging meniscus}. See {Lens}.
From WordNet (r) 2.0 [wn]:
noun
1: a disk of cartilage that serves as a cushion between the ends of bones that meet at a point [also: {menisci} (pl)]
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
36 Moby Thesaurus words for "meniscus": achromatic lens, astigmatic lens, burning glass, camera, coated lens, concave lens, concavo-convex lens, condenser, convex lens, crescent, crescent moon, eyeglass, eyepiece, glass, half-moon, hand lens, horseshoe, lens, lunula, lunule, magnifier, magnifying glass, object glass, objective, objective prism, ocular, prism, reader, reading glass, scythe, semicircle, sickle, telephoto lens, toric lens, varifocal lens, zoom lens
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