English

geotherm

From geo- + -therm.

Formed from geo + therm

Old Norse gjá ‘chasm, rift, crack’

Norn gjo ‘an inlet, gully or cleft in a rocky coast,…’

English geo

Ancient Greek θερμός ‘heat’

English therm

Today it means

noun A geoisotherm.

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

Etymograph / geotherm

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