megazoo

plural megazoos

1. A very large zoo.

   […] some nature reserves will inevitably become megazoos or zooparks.

   1983, Alan Howard Brush, George Alfred Clark, Perspectives in Ornithology, page 32

   2 more examples

   It may be necessary to reorganize some species of animals into new populations, some in captivity, some in the wild, with the animals being managed as a whole as a megazoo.

   1993, J. S. Hutchinson, Controlling Reproduction, page 6

   Zoos are returning to the integrated, environmental animal parks of ancient Mesopotamia, but in a more sophisticated manner. And at the same time, wild nature itself is becoming a megazoo — just a different kind of captivity.

   2001, Vernon N. Kisling, Zoo and Aquarium History