Final answer:
A mesh graft is the type of skin graft with a waffle appearance that can stretch to cover large wound areas. It allows for expansion due to its unique pattern, making it suitable for extensive wounds or burns.
Step-by-step explanation:
The skin graft that has a waffle appearance and is used to stretch over large wound areas is known as a mesh graft. This type of graft is created by making multiple incisions in a sheet of donor skin, resulting in a mesh-like pattern that allows the graft to expand and cover a larger surface area than it would in its original size. This method is particularly useful when treating extensive wounds, burns, or areas where skin elasticity is needed.