Wordnet 3.0
NOUN (1)
1.
a mechanism that creates a barrier between brain tissues and circulating blood;
serves to protect the central nervous system;
- Example: "the brain was protected from the large molecules of the virus by the blood-brain barrier"
WordNet (r) 3.0 (2006):
blood-brain barrier
n 1: a mechanism that creates a barrier between brain tissues
and circulating blood; serves to protect the central
nervous system; "the brain was protected from the large
molecules of the virus by the blood-brain barrier"