The story
From epi- + ethane. Described in paragraph P-25.4.2.2.2 of the IUPAC Blue Book Nomenclature of Organic Chemistry. IUPAC Recommendations and Preferred Names 2013.
Etymology from Wiktionary, CC BY-SA 4.0.
epiethane
Today it means: Ethane in a bridge position in a molecule. Full definition →