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

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May 23, 2015
debouch Hear it
to emerge or cause to emerge
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