Assuming you mean this: https://en.wikipedia.org/wiki/Methuselah_(tree) https://en.wikipedia.org/wiki/Methuselah_(tree) It says that its trunk is about 5,000 y

Assuming you mean this: https://en.wikipedia.org/wiki/Methuselah_(tree) https://en.wikipedia.org/wiki/Methuselah_(tree) It says that its trunk is about 5,000 y.o. as counted through growth rings. I would think most people would understand this to be the proper age of a "tree".