Arachnoid
21Arachnoid (astrogeology) — In astrogeology, an arachnoid is a large structure of unknown origin, and they have been found only on the surface of the planet Venus. Arachnoids get their name from their resemblance to spider webs. They appear as ovals surrounded by a complex… …
22arachnoid villus — one of the thin walled projections outwards of the arachnoid membrane into the blood filled sinuses of the dura, acting as a one way valve for the flow of cerebrospinal fluid from the subarachnoid space into the bloodstream. Large villi, known as …
23arachnoid membrane — noun the middle of the 3 meninges • Syn: ↑arachnoid • Hypernyms: ↑meninx, ↑meninges • Part Holonyms: ↑leptomeninges * * * arachnoid membrane noun (anatomy and …
24arachnoid mater — noun The middle layer of the meninges. A membrane that protects the brain and spinal cord below the dura mater and above the subarachnoid space and the pia mater. Syn: arachnoid …
25arachnoid mater — see arachnoid * * * arach·noid ma·ter (ə rakґnoid maґtər) (mahґter) arachnoidea mater …
26arachnoid of brain — cranial arachnoid arachnoidea mater cranialis …
27arachnoid cap cell — a type of epithelial cell in the arachnoid membrane; these are the cells of origin of some types of meningiomas …
28arachnoid cyst — a fluid filled cyst between the layers of the leptomeninges, lined with arachnoid membrane, most commonly occurring in the sylvian fissure; called also leptomeningeal c …
29arachnoid barrier cell layer — the outer layer of the cranial and spinal arachnoid mater, immediately internal to the dura mater and loosely attached to the dural border cell layer by occasional cell junctions. Its cells have tightly apposed cell membranes and are connected to …
30arachnoid trabeculae — trabeculae arachnoideae [TA] delicate fibrous threads connecting the inner surface of the arachnoid to the pia mater …
