I'm preparing for academic IELTS by writing some essays and then correcting those using a grammar correction app.
In the following sentence,
In its turn, each gore consists of horizontal segments, or panels.
The app suggests deleting a comma after 'segments', but it feels like it might change the meaning. I meant that 'panels' is another name for 'segments', but without the comma, it's probably possible to conclude that each gore can be made either of segments or from panels.
What is the correct comma usage here?