isomer

noun iso·mer \ ˈī-sə-mər \

Definition of isomer

1 :one of two or more compounds, radicals, or ions that contain the same number of atoms of the same elements but differ in structural arrangement and properties
2 :a nuclide isomeric with one or more others

Recent Examples of isomer from the Web

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

Origin and Etymology of isomer

International Scientific Vocabulary, back-formation from isomeric


Medical Dictionary

isomer

noun iso·mer \ ˈī-sə-mər \

medical Definition of isomer

1 :any of two or more compounds, radicals, or ions that contain the same number of atoms of the same elements but differ in structural arrangement and properties
2 :a nuclide isomeric with one or more others

Learn More about isomer


Seen and Heard

What made you want to look up isomer? 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

to speak evil of

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one-green-toy-robot-amidst-many-red-toy-robots
  • Which of these words does not mean "nonsense"?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Add Diction

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!