English

geothermobarometer

From geo- + thermo- + barometer.

Proto-Hellenic *gaya

Ancient Greek γῆ ‘earth’

English geo-

Proto-Indo-European *gʷʰer- ‘to be warm’

Proto-Indo-European *gʷʰermos

Proto-Hellenic *kʷʰermós

Ancient Greek θερμός ‘warm, hot’

Today it means

noun An instrument used for geothermobarometry.

Language periods are conventional ranges, not dates for this word.

Etymograph / geothermobarometer