Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A lighthouse lamp with lenses or reflectors to collect the rays of light and throw them in a given direction.

from the GNU version of the Collaborative International Dictionary of English

  • n. A lamp with lenses or reflectors to collect the rays of light and throw them in a given direction; -- used in lighthouses.

from The Century Dictionary and Cyclopedia

  • n. The improved form of optical apparatus now used in lighthouses, by which practically all the light from the lamp or other source is made available for the desired effect of illumination.

Etymologies

Ancient Greek (Wiktionary)

Examples

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