An instrument for measuring the thickness of the cerebral cortex; it consists of a graduated tube of thin glass that is inserted into the brain substance, so the depth of the gray matter can be read off on the scale.
[G. tephros, ashen, + hylē, stuff, + metron, measure]
Farlex Partner Medical Dictionary © Farlex 2012
tephrylometerAn obsolete device used to measure the thickness of cerebral grey matter.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.