Difference Between the Jungle & the Rainforest

I was struck by a question while in Costa Rica: Is there a difference between a rainforest and a jungle? Tonight I Googled the question and here's the distinction: A rainforest floor is clear and it's canopy allows almost no sunlight through. In contrast, the jungle floor is dense and moderate sunlight is allowed in. Given this distinction, I would say that what we were in was more accurately the jungle than the rainforest.