I've got a Word document to improve for accessibility. At the beginning of the document there is a section where a few icons / symbols are explained, which will appear later in the document.
I think you nailed it. Your list is analogous to a "dictionary list" as described in ISO 32000, paragraph 188.8.131.52.3 List Elements.
Of course you will want to add brief alt text to the Figure tags, something like "Smile icon".
As to formatting the Word document to have less work in Acrobat - dunno. Experiment.
So, I'm not the only one who believes that's the right way. I was not sure if it's ok to put a
<Figure> into a
Right now, my workaround is to create a multi level list which doesn't show a bullet point or a number. So it creates the list structure but without the
<Lbl> tag. That I'm going to fix in Acrobat manually.