Medical Definition of Arachnoid villi

1. Tufted prolongations of pia-arachnoid that protrude through the meningeal layer of the dura mater and have a thin limiting membrane; collections of arachnoid villus form arachnoid granulations that lie in venous lacunae at the margin of the superior sagittal sinus; the spongy tissue of the a. Villus contains tubules that serve as one-way valves for transfer of cerebrospinal fluid from the subarachnoid space to the venous system. Both a. Villus and the granulations formed from them are major sites of fluid transfer. See: arachnoid granulations. (05 Mar 2000)

Lexicographical Neighbors of Arachnoid Villi

arachnogenic
arachnogenic necrosis
arachnoid
arachnoid foramen
arachnoid granulations
arachnoid mater
arachnoid mater cranialis
arachnoid mater encephali
arachnoid maters
arachnoid membrane
arachnoid of brain
arachnoid of spinal cord
arachnoid trabecula
arachnoid villi (current term)
arachnoidal
arachnoidal granulations
arachnoidea
arachnoidea mater spinalis
arachnoidian
arachnoiditis
arachnoids
arachnologic
arachnological
arachnologist
arachnologists
arachnology
arachnolysin
arachnomancer

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