Canis lupus refers to the gray wolf, a species belonging to the Canidae family, which also includes domestic dogs and foxes. This term illustrates the connection between Latin roots and scientific nomenclature, as many scientific names in biology use Latin or Greek terms to describe species and their characteristics. In this case, 'canis' means 'dog,' and 'lupus' means 'wolf,' emphasizing the animal's identity and lineage within the canine family.