Final answer:
The term for the stone framework that supports a large stained glass window in a Gothic church is a flying buttress.
Step-by-step explanation:
In Gothic church architecture, the stone framework that supports a large stained glass window is known as buttressing, specifically flying buttresses. These structures were a significant architectural innovation, allowing Gothic churches to have thinner walls and larger window spaces, thus making room for magnificent stained glass windows that characterized the era. The use of flying buttresses can be seen as a response to the structural needs of these buildings, as they counteract the lateral forces pushing outwards on the walls. Without such support, the thin walls typical of Gothic architecture would not have been able to withstand the weight and thrust from the roof structures above.