atomic
adjectiveUK /əˈtɒm.ɪk/
US /əˈtɑː.mɪk/
Something atomic is very, very tiny, like the little bits that everything is made of.
Scientists study atomic particles that are too small to see.
OTHER MEANINGS
2. Relating to atoms or the energy released from atoms.
The atomic bomb changed the course of history.
3. Extremely small in amount or size.
The change made only an atomic difference to the total.
4. Relating to a single, indivisible unit.
The company treated each task as an atomic step in the process.