zoogloea UK /ˌzəʊ.əˈɡliː.ə/US /ˌzoʊ.əˈɡli.ə/ noun1 •A colony or mass of bacteria embedded in a viscous gelatinous substance, characteristic of a transitory stage through which rapidly multiplying bacteria pass in the course of their evolution. formszoogloeae · zoogloeas · zoögloeae