Definition of pre-atomic in English:

pre-atomic

adjective

  • Existing or occurring at a time before the development or use of atomic energy or atomic weapons; characteristic of such a time.

Origin

Early 20th century; earliest use found in H. G. Wells (1866–1946), novelist and social commentator. From pre- + atomic.

Pronunciation

pre-atomic

/ˌpriːəˈtɒmɪk/