platband

noun5

1. •
   A flat fascia on an architrave, or forming a border round a window, or a horizontal band along a wall.
2. •
   A fillet on a column, between the flutings.
3. •
   A border of flowers in a garden, especially along a wall; a strip of turf forming a border.
4. •
   (figurative) Any border.
5. •
   (rare) A flat lintel over a door or window.