elephant
n.— «Though more than a thousand discoveries are made in the U.S. yearly, “elephant fields”—those containing proven recoverable reserves of 100 million barrels of oil, one trillion cubic feet of gas, or the equivalant in mixed reserves—are rare. » —“Hottest U.S. Hydrocarbon Hunt Is In Western Rock Formation” Wall Street Journal Aug. 27, 1979. (source: Double-Tongued Dictionary)
Further reading
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...
Sara in Madison, Wisconsin, was reading an old edition of The Joy of Cooking and came across a recipe that described a cake’s ingredients as earrings for an elephant. She couldn’t discern whether the authors meant that was a good thing...