We found one dictionary that defines the word atomic explosions:

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1. atomic explosions: Vocabulary.com

(Note: See atomic_explosion as well.)

Definitions from WordNet (atomic explosion) ▸ noun:  the explosion of an atomic bomb ▸ Also see atomic_explosion ▸ Words similar to atomic explosions ▸ Usage examples for atomic explosions ▸ Idioms related to atomic explosions ▸ Wikipedia articles (New!) ▸ Words that often appear near atomic explosions ▸ Rhymes of atomic explosions ▸ Invented words related to atomic explosions