Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. A thin optical lens consisting of concentric rings of segmental lenses and having a short focal length, used primarily in spotlights, overhead projectors, and the headlights of motor vehicles.
Wiktionary
- n. The hollow cylindrical lens used in the Fresnel lamp.
GNU Webster's 1913
- (Optics) See under lens.
- n. (Opt.) a compound lens formed by placing around a central convex lens rings of glass so curved as to have the same focus; used, especially in lighthouses, for concentrating light in a particular direction; -- so called from the inventor.
WordNet 3.0
- n. lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length
Etymologies
- After Augustin Jean Fresnel. (American Heritage® Dictionary of the English Language, Fourth Edition)
Examples
“The tiny Fresnel lens showed a small black woman clad entirely in white standing on the other side.”
“The crystal facets of the huge Fresnel lens distorted his good arm, making it appear disjointed and huge.”
Lists
These user-created lists contain the word ‘Fresnel lens’.
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To the Lighthouse
Words having to do with lighthouses and beacons.
Fresnel lens, frost-lamp, cresset, lightroom, lightage, beaconage, eclipser, lampist, light-keeper, pharology, fanal, minar and 16 more...
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.light
phot, periscian, rushlight, phare, iridal, Fresnel lens, frost-lamp, cresset, pharology, firebare
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