Cercopithecoid is a term used to describe a particular type of Old World monkey that belongs to the family Cercopithecidae. Some synonyms for cercopithecoid include baboon, macaque, langur, colobus, and guenon. These primates are known for their diverse habitats and social behavior, often displaying complex hierarchies within their groups. They are also distinguished by their non-prehensile tails, which are used for balance and communication. Cercopithecoids are distributed throughout the Old World, including sub-Saharan Africa, Asia, and the Mediterranean region. Understanding the diverse species of cercopithecoids is important for understanding primate evolution and the complex behaviors and adaptations that they have developed over time.