The story
From sun + glass, as a back-formation when referring to sunglasses.
Etymology from Wiktionary, CC BY-SA 4.0.
sunglass
Today it means: A convex lens of glass for producing heat by converging the sun's rays into a focus. Full definition →
Today it means: A convex lens of glass for producing heat by converging the sun's rays into a focus. Full definition →
From sun + glass, as a back-formation when referring to sunglasses.
Etymology from Wiktionary, CC BY-SA 4.0.