heptaoxide التعريفات والمعاني == English == === Etymology === From hepta- + oxide. === Noun === heptaoxide (plural heptaoxides) Alternative form of heptoxide. شارك هذه المقالة: Facebook Twitter WhatsApp LinkedIn كلمات ذات صلة heptaoxides heptoxide heptakaidecahedron heptaoxid heptaoxodisilicate heptoxyde heptoxides heptoxydes hexaoxide