brain sand

n.

A gritty substance present in central nervous tissue or in the pineal gland.acervulus psammoma body

Nearby words

  1. brain fingerprinting,
  2. brain freeze,
  3. brain gain,
  4. brain hormone,
  5. brain mantle,
  6. brain scan,
  7. brain someone,
  8. brain stem,
  9. brain sugar,
  10. brain swelling


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

Examples from the Web for brain sand

  • This pigment is apparently calcium phosphate, which still remains as the 'brain-sand' of the human pineal gland.

    The Origin of Vertebrates|Walter Holbrook Gaskell
  • It contains a small quantity of peculiar particles of gritty, sand-like substance, which are sometimes called "brain-sand."