PIA

(redirected from pia mater)
Also found in: Dictionary, Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to pia mater: Arachnoid mater

PIA

(PERSONAL INVESTMENT AUTHORITY)

see SELF-REGULATORY ORGANIZATION.

Collins Dictionary of Economics, 4th ed. © C. Pass, B. Lowes, L. Davies 2005
References in periodicals archive ?
Role of the tumoral size and arterial vascularization originating from the pia mater. Study of 150 cases.
Imageandpathologicalobservation: Allimageswere reviewed by two experienced neuroimaging doctors to observe MRI signal characteristics, location, form and size of tumor, boundary peritumoral edema, existence of necrosis, cystic change, haemorrhage and calcification, enhancement degree, mass effect and whether tumor involved ependyma and pia mater. T1 and T2 signal strength of lesion could be typed into low, slightly low, medium, slightly high and high.
Some authors presume that such meningiomas arise from arachnoid cells of the pia mater that stretches into the surface of brain or sulcus with perforating blood vessels, while others suggest that the arachnoid cells rest in the brain during the migration progress [3].