The story
- Ancient Greekλῐ́θος (lĭ́thos)
- Englishlitho-
- Ancient Greekσφαῖρᾰ (sphaîră)
- Latinsphaera
- Late Latinsphēra
- Old Frenchsphere
- Middle Englishspere
- Englishsphere
- Englishlithosphere
- English todaylithospheric
From lithosphere + -ic.
Etymology from Wiktionary, CC BY-SA 4.0.