Meaning of the word subatomic in English

What does subatomic mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

subatomic

US /ˌsʌb.əˈtɑː.mɪk/
UK /ˌsʌb.əˈtɒm.ɪk/
"subatomic" picture

Adjective

relating to or being a particle smaller than an atom, such as a proton, neutron, or electron

Example:
Physicists study subatomic particles to understand the fundamental nature of the universe.
The behavior of matter at the subatomic level is governed by quantum mechanics.