Thus far, I've used the word "tea" rather loosely to describe any beverage brewed like tea, whether it actually contains tea or not. In the strictest sense, the word "tea" should only be used for products which contain tea from the camellia sinensis plant.
I've occassionally - and sporadically - tried to highlight this distinction, mostly by using quotes when I'm referring to something that technically isn't tea. From now on, I'm not going to bother. Let's be adult about this. I may sometimes use the word in a broader sense and that's that. It's all good, though. We're all friends here.