Genus Velociraptor is a term used to describe a group of theropod dinosaurs that lived approximately 75-71 million years ago. Synonyms for this term include Velociraptorinae, Velociraptoridae, and Megaraptoridae. These synonyms are used to describe different subgroups within the larger category of Genus Velociraptor. For example, Velociraptorinae refers to a subfamily of dromaeosaurid dinosaurs that includes Velociraptor, whereas Velociraptoridae and Megaraptoridae refer to larger groups that include other genera of dromaeosaurids. These synonyms are important for scientists to use in order to accurately classify and study the different species within this group of dinosaurs.