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"
roundel的用法和樣例：
例句
用作名詞 (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. 這些組件可直接替換樣式陳舊的白熾燈泡，適合於圓玻璃環，可替換現有圓玻璃、反射器和煤氣燈。
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