Hypertext Webster Gateway: "Sunglass"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Sunglass \Sun"glass`\, n.; pl. {Sunglasses}.
A convex lens of glass for producing heat by converging the
sun's rays into a focus. ``Lighting a cigar with a
sunglass.'' --Hawthorne.
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