I would say 'dot' and 'cross' etc. But I think something else entirely. Usually I have a little picture in my head of what I feel the operator does or what it'

I would say 'dot' and 'cross' etc. But I think something else entirely. Usually I have a little picture in my head of what I feel the operator does or what it's properties are. In this particular case I see/imagine a little purple bridge atop the operands that glows slightly and connects them. I'd say use whatever feels natural to you: names, colors, shapes, smells(?), other feelings... Now I really wonder if there are people who read symbolic expressions by associating smells or taste.