subatomic

adjective

sub·​atom·​ic ˌsəb-ə-ˈtä-mik 

1

: of or relating to the inside of the atom

2

: of, relating to, or being particles smaller than atoms

Examples of subatomic in a Sentence

Recent Examples on the Web

At subatomic scales, particles behave very differently from those in the real world, and scientists often have to develop new theories to explain this behavior. —Ameya Paleja, Interesting Engineering, 23 Apr. 2026

Axions are a theoretical subatomic particle that have existed as a concept since 1977 to explain the dark matter that makes up 85% of the universe’s mass. —Chase Hunter, Mercury News, 19 Apr. 2026

While still in its infancy, quantum technology harnesses subatomic particles to make potentially enormous advances in a wide range of computing applications. —Robert Channick, Chicago Tribune, 16 Apr. 2026

Ross-Lonergan analyzes data from Microboone, which checks Miniboone’s work by using next-generation technology capable of tracking the subatomic fireworks neutrinos can produce. —Quanta Magazine, 8 Apr. 2026

Word History

First Known Use

1874, in the meaning defined at sense 1

Rhymes for subatomic

• anatomic
• antidromic
• astronomic
• autonomic
• cryptogamic
• diatomic
• economic
• ergonomic
• gastronomic
• monatomic
• psychonomic
• taxonomic

Medical Definition

subatomic

adjective

sub·​atom·​ic ˌsəb-ə-ˈtäm-ik 

1

: of or relating to the inside of the atom

2

: of, relating to, or being particles smaller than atoms