isotope

noun
iso·​tope | \ ˈī-sə-ˌtōp How to pronounce isotope (audio) \

Definition of isotope

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

Other Words from isotope

isotopic \ ˌī-​sə-​ˈtä-​pik How to pronounce isotope (audio) , -​ˈtō-​ \ adjective
isotopically \ ˌī-​sə-​ˈtä-​pi-​k(ə-​)lē How to pronounce isotope (audio) , -​ˈtō-​ \ adverb

Examples of isotope in a Sentence

Recent Examples on the Web Scientists concluded that the moon appears to have different oxygen isotope compositions from our planet. Manasee Wagh, Popular Mechanics, 17 Mar. 2022 Consistent oxygen isotope values indicate that the paddlefish at the Tanis site lived entirely in freshwater, rather than migrating from salt and freshwater. Riley Black, Smithsonian Magazine, 23 Feb. 2022 The mission was to install a sensor, powered by the radioactive isotope Pu-238, and pick up evidence of Chinese nuclear testing. Kyle Mizokami, Popular Mechanics, 26 Feb. 2021 When a neutrino is absorbed by an atom of chlorine, an atom of the radioactive isotope argon 37 is formed. Mark Fischetti, Scientific American, 14 May 2022 Rapid decay of the copper isotope signals the presence of the antibody by positron emission tomography, i.e. a PET scan. William A. Haseltine, Forbes, 7 Mar. 2022 When analyzing the samples, the team found that the soils were highly depleted of the isotope carbon-13. Elizabeth Gamillo, Smithsonian Magazine, 18 Jan. 2022 This was the first case of an isotope with two different half-lives. Artemis Spyrou, The Conversation, 24 May 2022 Then the deuteron captures another proton to form a helium isotope and emits a gamma-ray photon. Scientific American, 1 Feb. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'isotope.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of isotope

1913, in the meaning defined at sense 1

History and Etymology for isotope

is- + Greek topos place

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Time Traveler for isotope

Time Traveler

The first known use of isotope was in 1913

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Dictionary Entries Near isotope

isotonize

isotope

isotope effect

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Statistics for isotope

Last Updated

3 Aug 2022

Cite this Entry

“Isotope.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/isotope. Accessed 8 Aug. 2022.

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More Definitions for isotope

isotope

noun
iso·​tope | \ ˈī-sə-ˌtōp How to pronounce isotope (audio) \

Medical Definition of isotope

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

Other Words from isotope

isotopic \ ˌī-​sə-​ˈtäp-​ik How to pronounce isotope (audio) , -​ˈtō-​pik How to pronounce isotope (audio) \ adjective
isotopically \ -​ˈtäp-​i-​k(ə-​)lē How to pronounce isotope (audio) , -​ˈtō-​pi-​ How to pronounce isotope (audio) \ adverb
isotopy \ ˈī-​sə-​ˌtō-​pē How to pronounce isotope (audio) , ī-​ˈsät-​ə-​pē How to pronounce isotope (audio) \ noun, plural isotopies

More from Merriam-Webster on isotope

Nglish: Translation of isotope for Spanish Speakers

Britannica English: Translation of isotope for Arabic Speakers

Britannica.com: Encyclopedia article about isotope

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