The Collaborative International Dictionary
Ooecium
Ooecium \O*[oe]"ci*um\, n.; pl. O[oe]cia. [NL., fr. Gr. w,'o`n an egg + ? a house.] (Zo["o]l.) One of the special zooids, or cells, of Bryozoa, destined to receive and develop ova; an ovicell. See Bryozoa.
Wiktionary
ooecium
n. an ovicell of a bryozoan