bialy (n.)youdaoicibaDictYouDict[bialy 词源字典]
bagel with onion flakes sprinkled on it, by 1936, ultimately short for Białystok, city in modern Poland. The city name is literally "white river," from Polish biały "white" + stok "river" (the Bialy River flows through the region).[bialy etymology, bialy origin, 英语词源]