Ceratopsidae refers to a group of herbivorous dinosaurs that lived during the Late Cretaceous period. This group is also commonly known as horned dinosaurs due to the bony protuberances on their skulls. There are several synonyms that can be used to refer to Ceratopsidae, including ceratopsians and ceratopsids. The former term is derived from the Greek words "keras" meaning horn, and "ops" meaning face, while the latter refers specifically to the family name Ceratopsidae. Other related terms include chasmosaurines and centrosaurines, which are subfamilies of the Ceratopsidae family. These various synonyms are commonly used among researchers and enthusiasts alike to describe the diverse array of horned dinosaurs that once roamed the Earth.