Final answer:
The architecture term 'serdab' applies to Egyptian tombs. It denotes a hidden chamber typically containing a statue of the deceased, acting as a spiritual portal.
Step-by-step explanation:
The key term that applies to the architecture of Egyptian tombs is serdab. The Serdab is a secret chamber in the Egyptian tomb that typically houses a statue of the deceased. An example of this architecture can be seen in the Step Pyramid of Djoser. The serdab served as a spiritual and symbolic portal that allows the Ka, or spirit, of the deceased to interact with the world of the living.
Learn more about Egyptian Tombs