411 REFERENCE · Wiktionary
Gravel Gertie
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
From a character in the Dick Tracy comic strip.
Noun
Gravel Gertie
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
en eponyms