zoo-

from The Century Dictionary.

• noun With the definite article, the Zoölogical Gardens in London: also used of any similar collection of animals.

from the GNU version of the Collaborative International Dictionary of English.

• A combining form from Gr. zwo^,n an animal, as in zoögenic, zoölogy, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• prefix zo- + -o-

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the facility where wild animals are housed for exhibition