LoxLox Lox Lox () is a fillet of brined salmon, that may or may not be smoked. Lox is frequently served on a bagel with cream cheese, and often garnished with tomato, sliced onion, cucumbers, and capers. Etymology. The American English word "lox" is derived from the Proto-Indo-European language, pronounced much as it is today. The word "lox" today has cognates in numerous Germanic languages. For example, cured salmon in Scandinavian countries is known by different versions of the name gravlax or gravad laks. ("Lax" or "laks" means "salmon" in the Scandinavian languages.) Its wide distribution likely means it existed  in its current form in a Proto-Indo-European language. Types. Other similar brined and smoked fish products include chubs, sable, smoked sturgeon, smoked whitefish, and kippered herring. These delicacies are popular in delis and gourmet stores, particularly in Northeastern USA cities that received significant Jewish, Eastern European and Russian immigration, such as New York City, Philadelphia and Chicago. Lox Lox () is a fillet of brined salmon, that may or may not be smoked. Lox is frequently served on a bagel with cream cheese, and often garnished with tomato, sliced onion, cucumbers, and capers. Etymology. The American English word "lox