epipelagic isn't even in either of the MacOS dictionaries I have installed (British & American). To make it worse, MacOS tries to define it as a mis-spelled ep

epipelagic isn't even in either of the MacOS dictionaries I have installed (British & American). To make it worse, MacOS tries to define it as a mis-spelled epileptic, overriding the "pelagic zone" which is more useful.