ʻO ka waiʻona he pūhui i loaʻa i ke kalapona, hydrogen, a me nā ʻātoma oxygen.He wai waihoʻoluʻu ʻole me kahi ʻala ʻokoʻa a me ka ʻono, hoʻohana mau ʻia i nā mea inu ʻona.ʻO C2H5OH ke kumu kemika no ka waiʻona, a ua hana ʻia ma ka fermentation o nā kō a me nā kīʻaha.
