blood–brain barrier

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noun \ˈbləd-ˈbrān-\

Definition of blood–brain barrier

  1. :  a naturally occurring barrier created by the modification of brain capillaries (as by reduction in fenestration and formation of tight cell-to-cell contacts) that prevents many substances from leaving the blood and crossing the capillary walls into the brain tissues

First Known Use of blood–brain barrier

1934


Medical Dictionary

blood–brain barrier

noun

Medical Definition of blood–brain barrier

  1. :  a naturally occurring barrier created by the modification of brain capillaries (as by reduction in fenestration and formation of tight cell-to-cell contacts) that prevents many substances from leaving the blood and crossing the capillary walls into the brain tissues—abbreviation BBB

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