arachnoid granulation

(redirected from Pacchionian bodies)
Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.
Related to Pacchionian bodies: Paccini's granulation

arachnoid granulation

Folds of the arachnoid layer of the cranial meninges that project through the inner layer of dura mater into the superior sagittal sinus and other venous sinuses of the brain. Through them, cerebrospinal fluid re-enters the bloodstream.
Synonym: arachnoid villus; pacchionian body
See also: granulation