from the GNU version of the Collaborative International Dictionary of English

  • n. a convex lens of considerable size, used for producing an intense heat by converging the sun's rays to a focus.

from The Century Dictionary and Cyclopedia

  • n. A double convex lens of glass used to ignite combustible substances, melt metals, etc., by focusing upon them the direct rays of the sun.


Sorry, no etymologies found.


    Sorry, no example sentences found.


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