Correct spelling for the English word "HCOX" is [ˈe͡ɪt͡ʃkˈɒks], [ˈeɪtʃkˈɒks], [ˈeɪ_tʃ_k_ˈɒ_k_s] (IPA phonetic alphabet).
There is no existing dictionary definition for the term "HCOX." It is possible that "HCOX" may be an acronym, abbreviation, or a non-standardized term used within a specific domain or context. Without further context or information, it is challenging to provide an accurate definition. It is important to note that acronyms and abbreviations can have multiple meanings depending on the field or industry they are used in. If you could provide additional information or context about "HCOX," I would be glad to help provide a more accurate definition.