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brain sand

brain sand in Medicine

brain sand n.
A gritty substance present in central nervous tissue or in the pineal gland. Also called acervulus, psammoma body.

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