Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A thin optical lens consisting of concentric rings of segmental lenses and having a short focal length, used primarily in lighthouses, spotlights, overhead projectors, and the headlights of motor vehicles.

from the GNU version of the Collaborative International Dictionary of English.

  • (Optics) See under lens.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun The hollow cylindrical lens used in the Fresnel lamp.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[After Augustin Jean Fresnel.]

Examples

    Sorry, no example sentences found.

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.