| Term Name: | arachnoid villus |
|---|---|
| Synonyms: | arachnoid granulations, arachnoid villi, arachnoid villus, arachnoidal granulations, glandulae pacchioni, glandulæ pacchioni, granulationes arachnoideales, pacchioni's granulations, pacchionian bodies, pacchionian glands, paccini's granulation |
| Definition: | Small protrusions of the arachnoid mater into vascular sinuses, acting as one-way pressure-sensitive valves. |
| Ontology: | Uberon Ontology [UBERON:0013153] |