Source : Webster's Revised Unabridged Dictionary (1913)

Vivarium \Vi*va"ri*um\, n.; pl. E. {Vivariums}, L. {Vivaria}.
   [L., fr. vivarius belonging to living creatures, fr. vivus
   alive, living. See {Vivid}.]
   A place artificially arranged for keeping or raising living
   animals, as a park, a pond, an aquarium, a warren, etc.

Source : WordNet®

vivarium
     n : an indoor enclosure for keeping and raising living animals
         and plants and observing them under natural conditions
     [also: {vivaria} (pl)]