Dear Carol Ann,
You are correct in your observation. Vinyasa has a much broader meaning than just doing Chaturanga-Up Dog-Down Dog. In fact, the classical definition of the word vinyasa is an important one to know and understand.
Vinyasa means a gradual progression or a step-by-step approach that systematically and appropriately takes a student from one point and safely lands them at the next point. It is sometimes described as the “breathing system,” or the union of breath and movement that make up the steps.
The word vinyasa has been popularized and is now used in many yoga classes to describe the connection of one pose to the next, as in the Sun Salutation that you described. It is now a commonly used “shorthand” in many flow classes.