Definition of blood–brain barrier in English:

blood–brain barrier

Syllabification: blood–brain bar·ri·er

noun

Physiology
A filtering mechanism of the capillaries that carry blood to the brain and spinal cord tissue, blocking the passage of certain substances.

Definition of blood–brain barrier in:

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Word of the day glee
Pronunciation: gliː
noun
great delight, especially from one's own good fortune…