hundred-year cup
n.— «Instead, he bought a tire cutter. The cutter slices the tires into two half-circles. By breaking the circle, the tires don’t trap methane gas, so they stay buried. According to Staley, the U shape has a secondary benefit. When tires fall into the landfill with the “U” facing upward, he explained, they create what is referred to as a “100-year cup” that prevents substances from leaching downward. It’s the next best thing to a lined landfill, he said.» —“Discarded tires pose challenges” by Linda Halstead-Acharya Billings Gazette (Mont.) Oct. 4, 2005. (source: Double-Tongued Dictionary)
Further reading
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There are eight major planets, but more than a million minor ones, including asteroids. If you discover one, you get the honor of naming it. The Dictionary of Minor Planet Names includes minor planets named for rock bands, jazz musicians, poets, and...