[建]葱形拱

[ noun ]
a pointed arch having an S-shape on both sides
<noun.artifact>

Ogee \O*gee"\, n. [F. ogive, augive, LL. augiva, of uncertain
origin; cf.LL. ogis a support, prop. L. augere to increase,
strengthen, Sp. auge highest point of power or fortune,
apogee, Ar. auj, an astronomical term.]
1. (Arch.) A molding, the section of which is the form of the
letter S, with the convex part above; cyma reversa. See
Illust. under {Cyma}.

2. Hence, any similar figure used for any purpose.

{Ogee arch} (Arch.), a pointed arch, each of the sides of
which has the curve of an ogee, that is, has a reversed
curve near the apex.