half-value layer

noun
half-val·​ue layer | \ -ˈval-(ˌ)yü-, -ˈval-yə- \

Medical Definition of half-value layer

: the thickness of an absorbing substance necessary to reduce by one half the initial intensity of the radiation passing through it

Learn More about half-value layer

Share half-value layer

Comments on half-value layer

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

WORD OF THE DAY

a servile follower or underling

Get Word of the Day daily email!

Test Your Vocabulary

What did you just call me?! A Quiz

  • rows-of-various-emoji
  • If a member of the audience describes your speech as bombastic, does that person mean it is:
Name That Thing

Test your visual vocabulary with our 10-question challenge!

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!