Final answer:
A galaxy is a large grouping of stars held together by mutual gravitational attraction, generally numbering in the billions of stars. The Milky Way Galaxy is an example of a galaxy that contains the stars visible in the night sky.
Step-by-step explanation:
The term that refers to large groupings of stars is Galaxy. A galaxy is a collection of stars held together by mutual gravitational attraction, generally numbering in the billions of stars. For example, when you look up at a star-filled sky on a clear night, all the stars visible to the unaided eye are part of a single collection of stars we call the Milky Way Galaxy.