isospin

noun
iso·​spin | \ ˈī-sə-ˌspin How to pronounce isospin (audio) \

Definition of isospin

: a quantum characteristic of a group of closely related subatomic particles (such as a proton and a neutron) handled mathematically like ordinary spin with the possible orientations in a hypothetical space specifying the number of particles of differing electric charge comprising the group

called also isotopic spin

First Known Use of isospin

1961, in the meaning defined above

Keep scrolling for more

Learn More about isospin

Statistics for isospin

Look-up Popularity

Time Traveler for isospin

The first known use of isospin was in 1961

See more words from the same year

More from Merriam-Webster on isospin

Britannica.com: Encyclopedia article about isospin

Comments on isospin

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

WORD OF THE DAY

showing great care, attention, and effort

Get Word of the Day daily email!

Test Your Vocabulary

Finance Words Quiz

  • a-piggy-bank
  • The etymology of mortgage is related most closely to which two words?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

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!