zooecium
From ZooTerms (Dictionary of Invertebrate Zoology)
zooecium (noun; plural zooecia; Greek zoon, animal; oikos, house): (Bryozoa: Stenolaemata;Gymnolaemata) 1. The skeleton of a zooid, comprised of calcareous layers of zooidal walls and connected zooidal structures. 2. In Phylactolaemata, comprised of any nonliving secreted parts of the body.
