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Definition of Gravel Gertie
1. Noun. A chamber, with a roof covered by a deep pile of gravel, within which nuclear warheads may be maintained; in the event of a (non-nuclear) explosion, the roof is weakened and the gravel falls and prevents the escape of nuclear material ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Gravel Gertie
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