aliasing: A circumstance where two or more variables refer to the same object.
delimiter: A character or string used to indicate where a string should be split.
element: One of the values in a list (or other sequence), also called items.
equivalent: Having the same value.
index: An integer value that indicates an element in a list.
identical: Being the same object (which implies equivalence).
list: A sequence of values.
list traversal: The sequential accessing of each element in a list.
nested list: A list that is an element of another list.
object: Something a variable can refer to. An object has a type and a value.
reference: The association between a variable and its value.