Medical Term:

tephrylometer

Pronunciation: tef′ri-lom′ĕ-tĕr

Definition: 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]

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