Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
barrier | Yes | No | No | No |
blood-brain barrier | Yes | No | No | No |
barrier (noun) | blood-brain barrier (noun) |
---|---|
a structure or object that impedes free movement | a mechanism that creates a barrier between brain tissues and circulating blood; serves to protect the central nervous system |
any condition that makes it difficult to make progress or to achieve an objective | |
anything serving to maintain separation by obstructing vision or access |