What do you call a tandem for three?

****** back blipping******

Another busy work day. Did not get out until Andi came at 7:30 pm and we walked to the Thai at Südstern.
Andi seems still not alright. I am sorry for him. 
Food was good although I ate too much.

Blipping this unusual bike for three. I have seen a few tandems, but not one for three people.