Architecture a semicircular or polygonal, usually domed projection of a building, especially the altar or east end of a church.

半圆形或多边形的，通常是建筑物的圆形穹窿，尤指祭坛或教堂东端。

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Architecture a semicircular or polygonal, usually domed projection of a building, especially the altar or east end of a church.

半圆形或多边形的，通常是建筑物的圆形穹窿，尤指祭坛或教堂东端。

youdao