ceratium

The story

1. Ancient Greek · derived fromκερᾱ́τῐον“little horn, carob”
2. Latin · borrowed fromcerātium“carob”
3. English todayceratium

From Latin cerātium (“carob”), from Ancient Greek κερᾱ́τῐον (kerā́tĭon, “little horn, carob”), diminutive of κέρᾰς (kérăs, “horn”). Doublet of carat, karat, and quilate.