isotope
noun
iso·tope
ˈī-sə-ˌtōp 
1
: any of two or more species of atoms of a chemical element with the same atomic number and nearly identical chemical behavior but with differing atomic mass or mass number and different physical properties
2
: nuclide
Examples of isotope in a Sentence
Recent Examples on the Web
AiA’s expertise is testing non-traditional isotopes and analyzing elements using plasma source mass spectrometry.
—
Sarah Jones, Sourcing Journal, 18 Nov. 2025
This includes everything from fuel injection and exhaust to impurity removal, isotope separation, and tritium storage.
—Aman Tripathi, Interesting Engineering, 16 Nov. 2025
Minuscule particles of the isotope found their way into more than 20 factories, including shrimp being packed into refrigerated containers by one of Indonesia’s largest seafood exporters and at a big factory producing shoes for brands including Nike and Adidas.
—Bloomberg, Mercury News, 14 Nov. 2025
Most of the uranium in fuel rods remains viable for power production after other waste isotopes impede the chain reaction.
—Brandon Loomis, AZCentral.com, 12 Nov. 2025
See All Example Sentences for isotope
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Sarah Jones, Sourcing Journal, 18 Nov. 2025
This includes everything from fuel injection and exhaust to impurity removal, isotope separation, and tritium storage.
—Aman Tripathi, Interesting Engineering, 16 Nov. 2025
Minuscule particles of the isotope found their way into more than 20 factories, including shrimp being packed into refrigerated containers by one of Indonesia’s largest seafood exporters and at a big factory producing shoes for brands including Nike and Adidas.
—Bloomberg, Mercury News, 14 Nov. 2025
Most of the uranium in fuel rods remains viable for power production after other waste isotopes impede the chain reaction.
—Brandon Loomis, AZCentral.com, 12 Nov. 2025
See All Example Sentences for isotope
Cite this Entry
“Isotope.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/isotope. Accessed 30 Nov. 2025.
Copy CitationKids Definition
isotope
noun
iso·tope
ˈī-sə-ˌtōp
: any of the forms of an element that differ in the number of neutrons in an atom
Medical Definition
isotope
noun
iso·tope
ˈī-sə-ˌtōp
1
: any of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behavior but with differing atomic mass or mass number and different physical properties
2
: nuclide
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