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Dictionary

blood'-brain' bar"rier

Pronunciation: (blud'brān'), [key] Physiol.
a layer of tightly packed cells that make up the walls of brain capillaries and prevent substances in the blood from diffusing freely into the brain: passage across the cell membranes is determined by solubility in the lipid bilayer or recognition by a transport molecule.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

bloodbath

blood brother

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