A tuple is a fixed fixed-length list containing elements that need not have the same type. It can be, and often is, used as a key-value pair. A row (sometimes called a record) is the set of fields within a table that are relevant to a specific entity.
The stem wall on a concrete foundation is essentially the supporting wall that joins the foundation of a building to the vertical walls of the structure that is constructed atop the foundation.
Definition of stone wall 1: a fence made of stones; especially: one built of rough stones without mortar to enclose a field 2: an immovable block or obstruction (as in public affairs)