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出典:Wiktionary
出典:『Wiktionary』 (2026/04/12 20:41 UTC 版)
Trademark; an abbreviation of "Water Displacement, 40th formula" or "40th attempt" used by Norm Larson of the Rocket Chemical Company of California, the oil's developer.
WD-40
出典:Wikipedia
出典:『Wikipedia』 (2011/07/03 17:15 UTC 版)
WD-40 is the trademark name of a widely-available water-displacing spray developed in 1953 by Norm Larsen, founder of the Rocket Chemical Company, San Diego, California. It was originally designed to repel water and prevent corrosion, and later was found to have numerous household uses.