The Collaborative International Dictionary
Zooecium
Zooecium \Zo*[oe]"ci*um\, n.; pl. Zo[oe]cia. [NL., fr. Gr. zw^,on an animal + ? house.] (Zo["o]l.) One of the cells or tubes which inclose the feeling zooids of Bryozoa. See Illust. of Sea Moss.
Wiktionary
zooecium
n. (context zoology English) One of the cells or tubes which enclose the feeding zooids of Bryozoa.