rice vermicelli ka -- just the name of the noodle naka not the name of the dish
If you want to tell your farang friend about this dish, you should probably say as stated in comment 1. .. Thai rice vermicelli served with curry.
Rice noodle is a bit more flat and is usually used to make Pad Thai, while rice vermicelli is round-type noodle, and it is what we use to make kanom jeen in the US ka'.
Hope this helps :)