Source : Webster's Revised Unabridged Dictionary (1913)

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.