blood-brain barrier -- (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")
dictionary, definition of, free online dictionary, online dictionary, English dictionary, dict, diction, dictonary, glossary, define, definitions, meaning, word of the day, spelling, pronunciation, dictio, dictiona, dic, dicti, dictionar