Liberal Dictionary English Dictionary
brain sand n.
- A gritty substance present in central nervous tissue or in the pineal gland.acervulus psammoma body
Examples from the Web for brain sand Historical Examples of brain sand
This pigment is apparently calcium phosphate, which still remains as the ‘brain-sand’ of the human pineal gland.
Walter Holbrook Gaskell
It contains a small quantity of peculiar particles of gritty, sand-like substance, which are sometimes called “brain-sand.”
Clairvoyance and Occult Powers
Swami Panchadasi
