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
isotopicplay \ˌī-sə-ˈtä-pik, -ˈtō-\ adjective
isotopicallyplay \ˌī-sə-ˈtä-pi-k(ə-)lē, -ˈtō-\ adverb
Recent Examples of isotope from the Web
Now, a team at the University of Münster has discovered some relevant evidence in an unexpected location: the isotope ratios found in various meteorites.
Meteorite samples analyzed fall into two distinct groups with different isotope signatures.
Pitching prospect Jeff Hoffman was scratched from a scheduled start with the Triple-A Isotopes in Albuquerque and may soon start for the Rockies.
But this rocket is temperamental, and as unstable as a radioactive isotope.
Hobbie notes that people can be carbon-dated, thanks to radiocarbon isotopes in tooth enamel and other human tissues put together after the thermonuclear tests of the mid-20th century.
Estevez flew in from Memphis where the Isotopes are playing, arriving at Target Field at 11:15 a.m. Thursday.
Using just a handful of hair strands only a few inches long from Edith’s scalp, Eerkens and UC Santa Cruz biomolecular engineering associate professor Ed Green mapped the girl’s DNA and chemical isotopes.
And on the leading edge of coralline research, Williams and a colleague are using boron isotopes to help determine pH, another critical component in water chemistry.
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.
Origin and Etymology of isotope
is- + Greek topos place
First Known Use: 1913See Words from the same year
ISOTOPE Defined for English Language Learners
Definition of isotope for English Language Learners
chemistry : any one of various forms in which the atoms of a chemical element can occur
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
Seen and Heard
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