What do you call a noun for which pronoun is substitued?

The noun for which a pronoun is substituted is called the antecedent.

For example:

* The dog wagged its tail.

* "Dog" is the antecedent of the pronoun "its".

* Sarah went to the store, but she couldn't find what she was looking for.

* "Sarah" is the antecedent of the pronouns "she" and "she".