The story
- Ancient Greek · derived fromἴσος“equal”
- French · derived fromisotherme“of equal temperature”
- English todayisotherm
From the French isotherme (“of equal temperature”, adjective), itself from Ancient Greek ἴσος (ísos, “equal”) + θέρμη (thérmē, “warmth”). By surface analysis, iso- + -therm.
Words from the same roots
Ancient Greekἴσος all →
isotropicisochronousisobariso-isochronalisochronyisogloss
Etymology from Wiktionary, CC BY-SA 4.0.