isotope

play
noun iso·tope \ˈī-sə-ˌtōp\

Definition of isotope

  1. 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. 2 :  nuclide

isotopic

play \ˌī-sə-ˈtä-pik, -ˈtō-\ adjective

isotopically

play \ˌī-sə-ˈtä-pi-k(ə-)lē, -ˈtō-\ adverb

Recent Examples of isotope from the Web

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: 1913

Other Chemical Engineering Terms


ISOTOPE Defined for English Language Learners

isotope

play
noun

Definition of isotope for English Language Learners

  • chemistry : any one of various forms in which the atoms of a chemical element can occur


Medical Dictionary

isotope

play
noun iso·tope \ˈī-sə-ˌtōp\

Medical Definition of isotope

  1. 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. 2:  nuclide

isotopic

\ˌī-sə-ˈtäp-ik, -ˈtō-pik\play play adjective

isotopically

\-ˈtäp-i-k(ə-)lē, -ˈtō-pi-\play play adverb

isotopy

\ˈī-sə-ˌtō-pē, ī-ˈsät-ə-pē\play play noun plural

isotopies



Seen and Heard

What made you want to look up isotope? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

of or relating to bile

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • istock-refers-to-this-as-a-tumble-of-strawberries-which-sounded-pretty-nice-to-us
  • Which is a synonym of garner?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!