SUNGLASS

sunglass

(noun) a convex lens that focuses the rays of the sun; used to start a fire

Source: WordNet® 3.1

Etymology

Noun

sunglass (plural sunglasses)

singular of sunglasses; used chiefly in compounds

Noun

sunglass (plural sunglasses)

(archaic) A convex lens of glass for producing heat by converging the sun's rays into a focus.

Lighting a cigar with a sunglass — Hawthorne.

Source: Wiktionary

Sun"glass`, n.; pl. Sunglasses (.

Definition: A convex lens of glass for producing heat by converging the sun's rays into a focus. "Lighting a cigar with a sunglass." Hawthorne.

Source: Webster’s Unabridged Dictionary 1913 Edition

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