psammoma

Medical Dictionary

psammoma psam·mo·ma (sā-mō'mə)
n. pl. psam·mo·mas or psam·mo·ma·ta (-mə-tə)
Psammomatous meningioma. No longer in technical use.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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WordNet
psammoma

noun
a tumor derived from fibrous tissue of the meninges or choroid plexus or certain other structures associated with the brain; characterized by sandlike particles 
WordNet® 3.0, © 2006 by Princeton University.
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