Illustrated Glossary of Organic Chemistry

Epoxide (oxirane): A heterocycle of molecular formula C₂H₄O consisting of a three-membered ring with two carbons and one oxygen. This molecule is also called ethylene oxide. Also refers to any molecule that contains the oxirane ring system.

Molecular Structure of Oxirane (Ethylene Oxide)

Lewis structure		Ball and spoke		Space filling model		Molecular model kit

Styrene oxide, a typical epoxide.