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half-value layer

4 ENTRIES FOUND:
  1. half-value layer (noun)
  2. Polenske value (noun)
  3. Reichert value (noun)
  4. resource-based relative value scale (noun)

half–val·ue layer

noun \-ˈval-(ˌ)yü-, -ˈval-yə-\

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