Cod is the common name for the genus Gadus of demersal fishes, belonging to the family Gadidae. Cod is also used as part of the common name for a number of other fish species, and there are species suggested to belong to genus Gadus that are not called cod (the Alaska pollock).

Cod is the common name for fish of the genus Gadus, as well as being used to refer to several other varieties of fish.

Sadu (; ) is a commune in Sibiu County, Transylvania, Romania, at the foothills of the Cindrel Mountains, 27 km south of the county capital Sibiu, in the Marginimea Sibiului ethnographic area. It is composed of a single village, Sadu.