Definition

1. Noun:
   • A family of herbivorous, beaked dinosaurs: "Family Ceratopsidae" refers to a specific taxonomic family of large, quadrupedal, herbivorous dinosaurs characterized by their beaked mouths, elaborate frills (bony neck shields), and often prominent facial horns. They lived during the Late Cretaceous period.

Usage

• The term "Family Ceratopsidae" is used in scientific and paleontological contexts to classify a distinct group of ceratopsian dinosaurs. It is a formal taxonomic name.
• Example: is the most famous genus belonging to the Family Ceratopsidae.

Advanced Usage

• In cladistics (a method of biological classification), Ceratopsidae is defined as the least inclusive clade containing and . This means all descendants of their common ancestor are part of this family.
• The family is often divided into two subfamilies: Chasmosaurinae (typically with long frills) and Centrosaurinae (typically with shorter frills and prominent nasal horns).

Variants and Related Words

• Ceratopsid (noun/adjective): A member of the Family Ceratopsidae; or, relating to this family.
  • The fossil was identified as a ceratopsid dinosaur.
• Ceratopsian (noun/adjective): A broader term referring to any member of the larger group (Ceratopsia) that includes both Ceratopsidae and their earlier, smaller relatives like .

Synonyms

• Horned dinosaurs (common name): This is a general, non-scientific synonym for members of this family, though it is imprecise as not all ceratopsids had large horns.
• Ceratopsids: The direct synonym for members of the family.

Related Terms and Concepts

• Frill: The large bony shield extending from the back of the skull, a key characteristic of ceratopsids.
• Rostral bone: The unique beak bone at the tip of the upper jaw, present in all ceratopsians.
• Marginal ossifications: The separate bones (epoccipitals) that often edged the frill.

Noun

1. American ceratopsian dinosaurs