The Collaborative International Dictionary
Zoocytium
Zoocytium \Zo`["o]*cy"ti*um\, n.; pl. Zo["o]cytia. [NL., fr. Gr. zw^,on an animal + ? a hollow vessel.] (Zo["o]l.) The common support, often branched, of certain species of social Infusoria.
Wiktionary
zoocytium
n. (alternative form of zoöcytium English)