Meaning

noun a gas burner used in laboratories; has an air valve to regulate the mixture of gas and air

noun an inactive volcano in Sicily; last erupted in 1961; the highest volcano in Europe (10,500 feet)

originFrom the Latin Aetna, perhaps via the Italian Etna. From either Ancient Greek Αἴτνη (Aítnē, “Aetna”) or αἴθω (aíthō, “to burn”), or from a Sicanian dialect Italic base *aið-na (“fiery one”), all from Proto-Indo-European *h₂eydʰ- (“burn; fire”). Doublet of Aetna.

Etymology from Wiktionary, CC BY-SA 3.0