Meaning

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

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

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