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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.

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The magnetic impurity contains unpaired electrons whose spin gives the atom its magnetism.

From Science Daily ● Oct. 10, 2026

Those electrons can flip their own spins in ways that partially cancel the magnetic moment of the embedded atom.

From Science Daily ● Oct. 10, 2026

The U.S. government initiated and oversaw the entire enterprise that unleashed the atom and made the bomb.

From The Wall Street Journal ● Oct. 8, 2026

RNA and DNA differ chemically by only one oxygen atom in each sugar unit.

From Science Daily ● Oct. 2, 2026

On such a scale an individual atom is essentially impossible to imagine, but we can of course try.

From "A Short History of Nearly Everything" by Bill Bryson

The Vienna team has now demonstrated that the nuclei of thorium atoms can perform the same function.

From Science Daily ● Oct. 11, 2026

Their values influence everything from the behavior of atoms and chemical bonds to the nuclear reactions that power stars and produce elements essential for life.

From Science Daily ● Oct. 11, 2026

"The great advantage of the new nuclear clock in Vienna is that, if you use atomic nuclei rather than atoms, much higher precision is possible in principle," says Thorsten Schumm.

From Science Daily ● Oct. 11, 2026

By carefully controlling the laser's power and beam diameter, the researchers can ionize a narrow region of air, stripping electrons from atoms and molecules to produce plasma.

From Science Daily ● Oct. 9, 2026

To get rid of all of the energy in the banana, you’ve got to stop its atoms from moving around; you have to put it in a box and cool it down.

From "Zero: The Biography of a Dangerous Idea" by Charles Seife


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