I had a variable that did not itself hold the value, but acted as though it did. Is was not a proxy. Nor was it a reference. The variable held only a portion of the value but could itself get the remaining portion when needed. This kind of delayed acquisition behavior is common in programming. It is used when the remaining portion of the value is costly to acquire, eg takes a long time to compute or retrieve, or holding it puts a burden on the system, eg using a significant amount of memory.
I ended up calling the variable mik_jug_winding. Winding as in "The river winds through the valley." I like it, but given that I felt the need to write a posting about it perhaps it lacks the needed signification.