dimethyloxy
Dimethyloxy is a term that does not correspond to any recognized chemical compound or scientific concept. It appears to be a nonsensical or potentially misspelled word. In chemistry, prefixes like "di-" and "oxy-" are commonly used, as are suffixes like "-yl" and "-o". A systematic combination of these might lead to a valid chemical name, but "dimethyloxy" itself does not follow standard nomenclature rules for organic or inorganic compounds.
It is possible that "dimethyloxy" is a typographical error for a similar-sounding chemical name. For example,