English form of rondeau having three triplets with a refrain after the first and third
round piece of armor plate that protects the armpit
(heraldry) a charge in the shape of a circle;
"a hollow roundel"
例句
用作名词 (n.)
The assemblies are a direct replacement for older style incandescent bulbs, fitting into the roundel ring as a replacement for the existing roundel, reflector and bracket. 这些组件可直接替换样式陈旧的白炽灯泡，适合于圆玻璃环，可替换现有圆玻璃、反射器和煤气灯。
美
['raʊndl]
