'Geothermometer' definitions:

Definition of 'Geothermometer'

From: GCIDE

Geothermometer \Ge`o*ther*mom"e*ter\, n. [Gr. ge`a, gh^, the earth + E. thermometer.] (Physics) A thermometer specially constructed for measuring temperetures at a depth below the surface of the ground. [1913 Webster]