English
isomer bomb
From isomer + bomb from being a bomb fuelled by nuclear isomer changes.
Ancient Greek βόμβος ‘booming, humming’
Latin bombus ‘a booming sound’
Italian bomba
French bombe
English bomb
Today it means
noun a type of theoretical radiological nuclear weapon that relies on an induced rapid change in the state of nuclear isomers to generate an intense gamma ray flash.
Language periods are conventional ranges, not dates for this word.
Etymograph / isomer bomb