lens
/lɛnz/ noun B1- An object, usually made of glass, that focuses or defocuses the light that passes through it.
- A device which focuses or defocuses other waves or radiation, such as microwave radiation, electron beams, sound waves (acoustic lenses), or explosions (explosive lenses).
- A convex shape bounded by two circular arcs, joined at their endpoints, the corresponding concave shape being a lune.
- The transparent crystalline structure in the eye.
- A body of rock, ice, or water shaped like a convex lens.
- A convex layer of fresh groundwater that floats above the denser saltwater, usually found on small coral or limestone islands and atolls.
- A construct used in statically-typed functional programming languages to access nested data structures.
- A way of looking, literally or figuratively, at something.
Plural lenses
From the library
I could not make it out when first I saw the light flashing upon the lens.” He rose and peeped into the hut.
He examined them carefully with his lens, and then some dim and vague marks upon the earth beneath.
Then with an expression of interest he laid down his cigarette, and carrying the cane to the window, he looked over it again with a convex lens.
And yet they have missed him up to now!” Holmes had gone to the window and was examining with his lens the blood mark on the sill.
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