noun (plural menisci /-kē/ /-kī/ or meniscuses)Physics
1The curved upper surface of a liquid in a tube.
- The curve of the meniscus between the fluids can be altered with currents sent through the tube, which changes the focus of the lens.
- When the water column is cut, the pressure of the water column is increased to atmospheric pressure when the meniscus is flat.
- I recall spending lengthy moments reading the meniscus on a thermometer to determine the precise temperature reading in an experiment.
1.1 [usually as modifier] Optics A lens that is convex on one side and concave on the other.
- Petzval produced an achromatic portrait lens that was vastly superior to the simple meniscus lens then in use.
- Invented in 1876, the Mangin mirror consists of a meniscus negative lens with a mirrored convex second surface.
- It's the same with lenses; in addition, the self-centering problem is even more pronounced for meniscus shapes and other optics with long focal lengths.
1.2 Anatomy A thin fibrous cartilage between the surfaces of some joints, e.g., the knee.
- In January 1992, arthrography was done of the left knee, which showed according to Dr. Bernard Parent no sign of any tearing of the meniscus.
- Within a week of having 85 per cent of his meniscus removed, he was running, and three days later he was back playing for the Swans.
- He had a torn meniscus, which is the same thing, it's a torn muscle.
Late 17th century: modern Latin, from Greek mēniskos 'crescent', diminutive of mēnē 'moon'.
Words that rhyme with meniscusdiscus, hibiscus, viscous
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