isomer

noun
iso·​mer | \ ˈī-sə-mər How to pronounce isomer (audio) \

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

First Known Use of isomer

1855, in the meaning defined at sense 1

History and Etymology for isomer

International Scientific Vocabulary, back-formation from isomeric

Keep scrolling for more

Learn More about isomer

Dictionary Entries near isomer

Isoloma

isolux

isomagnetic

isomer

isomerase

isomere

isomeric

Statistics for isomer

Look-up Popularity

Time Traveler for isomer

The first known use of isomer was in 1855

See more words from the same year

Keep scrolling for more

More Definitions for isomer

isomer

noun
iso·​mer | \ ˈī-sə-mər How to pronounce isomer (audio) \

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

More from Merriam-Webster on isomer

Britannica.com: Encyclopedia article about isomer

Comments on isomer

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

WORD OF THE DAY

a usually brief trip or an expedition

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Dictionary Devil

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!