柯林斯詞典roundel /?ra?nd?l/ (roundels) 1. N-COUNT A roundel is a circular design, for example one painted on a military aircraft. 圓形設(shè)計 返回 roundel劍橋詞典a circular decoration , especially a coloured circle on a military aircraft that shows its nationality 圓形裝飾；（尤指戰(zhàn)斗機上顯示國籍的）圓形標(biāo)記 返回 roundel