Final answer:
A dictionary that maps movie names to their popularity is known as a popularity dictionary or popularity map, a concept used in computer science for organizing and accessing data efficiently.
Step-by-step explanation:
A dictionary where the keys are movie names and the values are corresponding movie popularity is typically called a popularity dictionary or popularity map. In the world of programming, this data structure is used to associate a unique key (in this case, a movie name) to a particular value (here, the movie's popularity). Such dictionaries are often used to organize and access data efficiently, and they are a crucial concept in computer science.