polka dot
noun [ C usually plural ] uk/ˈpɒl.kə ˌdɒt/ us/ˈpoʊl.kə ˌdɑːt/
（衣料上的）圆点花纹
one of a large number of small, round spots that are printed in a regular pattern on cloth
a shocking pink dress with white polka dots 带有白色圆点花纹的艳粉色连衣裙
a polka-dot bikini/bow tie 圆点花纹比基尼泳装／领结