circular arch

circular arch

An arch whose intrados takes the form of a segment of a circle.
See also: Arch

circular arch

An arch whose intrados takes the form of a segment of a circle.
References in classic literature ?
The ascent into the tower is by an exceeding deep flight of steep steps, four feet and a half wide, on the south side leading to a low doorway, over which is a circular arch crossed by a great transom stone.
where ERROR is the deviation between intersection of tangent lines (I) and the circular arch