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Added 10 October 2026

sunglass

noun

noun Definition from WordNet 3.1, Princeton University. More about sunglass at Wordnik → Where our words come from →

A convex lens that focuses the rays of the sun; used to start a fire.

Origin

From sun + glass, as a back-formation when referring to sunglasses.

From Wiktionary, via Kaikki.org (CC BY-SA)

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