Any of various objects suggesting a crescent or halfmoon, as, in architecture, a semicircular window in dome, the upper section of a wall at the end of a corridor with an arched or vaulted roof, or a picture painted in such a section.

新月形之物；半月形之物；【建】半圆壁；弧面顶画。

A corner or projecting section, shaped thus: jutting out from the main line of a rampart or defensive embankment.

眼镜堡之凸出部分。

Spectacles.

眼镜；眼罩。