delta ray

noun

Definition of delta ray

: an electron ejected by an ionizing particle in its passage through matter

First Known Use of delta ray

1908, in the meaning defined above

Keep scrolling for more

Learn More about delta ray

Statistics for delta ray

Look-up Popularity

Time Traveler for delta ray

The first known use of delta ray was in 1908

See more words from the same year

More from Merriam-Webster on delta ray

Rhyming Dictionary: Words that rhyme with delta ray

Britannica.com: Encyclopedia article about delta ray

Comments on delta ray

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

WORD OF THE DAY

something valued as if it were money

Get Word of the Day daily email!

Test Your Vocabulary

Time Traveler Quiz: Which Word Came First?

  • time traveler quiz which word came first
  • Which came first?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

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!