Nota de aplicación
Gardens, parks, or other grounds in which wild animals, and sometimes also domestic animals, are kept for public exhibition, usually in enclosures. Animals in zoos can generally be given more intensive care than is possible in nature reserves or wildlife refuges. Marine invertebrates, fish, and sometimes marine mammals, are often kept in separate aquariums.
- Moliner, María, "Diccionario de uso del Español", vol. 2, Gredos S.A., España, Madrid, 2004, p. II:111