ramping arch from the top of a wall to support a higher pier
Arching above a side aisle roof, flying buttresses support the main vault of St. Mary's Church, in Lübeck, Germany.
The flying buttress (arc-boutant, arch buttress) is a specific form of buttress composed of a ramping arch that extends from the upper portion of a wall to a pier of great mass, to convey to the ground the lateral forces that push a wall outwards, which are forces that arise from vaulted ceilings of stone and from wind-loading on roofs.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).