Wd-40 definitions

WD-40 is defined as an abbreviation for Water Displacement-40th attempt, a product originally designed to protect space missiles from rusting and corroding.

An example of WD-40 is the product sold in hardware stores to fix squeaks, lubricate metal parts and protect from rust.

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Arguably one of the two greatest inventions of the twentieth century (duct tape is the other),WD-40 was invented by Norm Larsen on his 40th attempt to develop a formula to prevent corrosion by displacing water. In addition to displacing water, WD-40 is a multipurpose problem solver that variously cleans, removes, dissolves, degreases, penetrates, and lightly lubricates various other items.The formula for WD-40 remains a closely guarded secret.As the saying goes, "If it is stuck and shouldn't be,WD-40 it. It if is unstuck and shouldn't be, duct tape it."The WD-40 Company did not pay me for this definition, but they should. See also duct tape.
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A penetrating oil used to protect electric circuits from moisture.
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Origin of wd-40

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.