Cebidae, commonly known as New World monkeys, refers to a family of primates in the taxonomic classification system. Synonyms for Cebidae include Platyrrhini and Callitrichidae. Platyrrhini refers to a group of primates that possess broad, flat noses and prehensile tails. Callitrichidae, on the other hand, mainly refers to the marmosets and tamarins, which are small-sized New World monkeys known for their distinct features such as claws instead of nails, suckling infants, and vocal communication. The use of synonyms is significant, especially in scientific classification, as it helps in the clear and precise identification of animals, plants, and other living things.