A zoo (short for zoological park, zoological garden, or animal park, and also called a menagerie) is a facility in which animals are confined within enclosures, displayed to the public, and in which they may also be bred.The term zoological garden refers to zoology, the study of animals, a term deriving from the Greek zōon (ζῷον, "animal") and lógos (λóγος, "study").