| psammomatous | Possessing or characterised by the presence of psammoma bodies; refers usually to certain types of meningioma or to meningeal hyperplasia with psammoma bodies. (05 Mar 2000) |
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| psammomatous meningioma | <tumour> A firm cellular neoplasm derived from fibrous tissue of the meninges, choroid plexus, and certain other structures associated with the brain, characterised by the formation of multiple, discrete, concentrically laminated, calcareous bodies (psammoma bodies); most of these neoplasms are histologically benign, but may lead to severe symptoms as a result of compressing the brain. Synonym: angiolithic sarcoma, sand tumour, Virchow's psammoma. (05 Mar 2000) |
| psammous | Sandy. Origin: G. Psammos, sand (05 Mar 2000) |
| psarolite | <paleontology> A silicified stem of tree fern, found in abundance in the Triassic sandstone. Origin: Gr. Speckled. Source: Websters Dictionary (01 Mar 1998) |
| Psaume | J., 20th century French physician. See: Papillon-Leage and Psaume syndrome. (05 Mar 2000) |