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Definitions

atom

[at-uhm] / ˈæt əm /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

After knocking out an electron from the neon atom using soft X-rays, they followed how the system evolved for up to a picosecond, which is extremely long on an atomic timescale, before the decay occurred.

From Science Daily • Mar. 24, 2026

"Our new catalyst has a single atom architecture, in which isolated active metal atoms are anchored on the surface of a specially developed support material," Pérez-Ramírez explains.

From Science Daily • Mar. 20, 2026

So he was not dealing with ordinary, day-to-day stuff, let alone whether you should pursue an atom bomb.

From Slate • Mar. 11, 2026

Scientists previously discovered that when atom thin crystals are stacked with a small angular mismatch, their electronic properties can transform.

From Science Daily • Mar. 2, 2026

Three profoundly destabilizing scientific ideas ricochet through the twentieth century, trisecting it into three unequal parts: the atom, the byte, the gene.

From "The Gene" by Siddhartha Mukherjee