Definition

1. Noun:
   • A taxonomic class of vertebrates: In biological classification, "Aves" is the scientific class that includes all living and extinct birds. Members of this class are characterized by feathers, beaks, wings, and the laying of hard-shelled eggs.

Usage

• "Aves" is a formal, scientific term used primarily in zoology, ornithology, and taxonomy. It is not used in everyday conversation. When used, it typically refers to the entire class of birds as a group in an academic or technical context.

Examples

• Noun:
  • The class Aves includes over 10,000 living species.
  • In the tree of life, Aves is a class within the phylum Chordata.
  • The fossil record provides evidence for the evolution of Aves from theropod dinosaurs.

Advanced Usage

• "Aves" in Phylogenetics: Used to discuss the evolutionary relationships and cladistics of birds.
  • Recent studies have refined the phylogenetic placement of Aves within Dinosauria.

Variants and Related Words

• Avian (adj): Of or relating to birds.
  • Avian influenza is a virus that affects birds.
• Avifauna (n): The birds of a particular region, habitat, or geological period.
  • The island's avifauna is remarkably diverse.

Synonyms

• Birds (n): The common term for creatures of the class Aves.
• Class Aves (n): The full taxonomic designation.

Notes

• "Aves" is always treated as a plural noun in a taxonomic sense (e.g., "Aves are...").
• It is often italicized in scientific writing, as is customary for genus and species names, though class names are sometimes not.

Noun

1. (ornithology) the class of birds