Medical Dictionary

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

Seen and Heard

What made you want to look up half-value layer? 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

serious difficulty or misfortune

Get Word of the Day daily email!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!