preatomic
adjective
pre·atom·ic
ˌprē-ə-ˈtä-mik 
: of or relating to a time before the use of the atomic bomb and atomic energy
Cite this Entry
“Preatomic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/preatomic. Accessed 30 Oct. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share