The Collaborative International Dictionary of English v.0.48:

Ooecium \O*oe"ci*um\, n.; pl. Ooecia. [NL., fr. Gr. w,'o`n an
   egg + ? a house.] (Zool.)
   One of the special zooids, or cells, of Bryozoa, destined to
   receive and develop ova; an ovicell. See Bryozoa.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bryozoum \Bry`o*zo"um\, n. [NL. See Bryozoa.] (Zool.)
   An individual zooid of a bryozoan coralline, of which there
   may be two or more kinds in a single colony. The zo[oe]cia
   usually have a wreath of tentacles around the mouth, and a
   well developed stomach and intestinal canal; but these parts
   are lacking in the other zooids (Avicularia, O[oe]cia,
   etc.).
   [1913 Webster]