ovicell

from The Century Dictionary.

• noun The oöcyst of a polyzoan; a dilatation of the body-wall of the polypid, in which the germs may undergo early stages of their development.
• noun An early state of the ampullaceous sacs in sponges.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Zoöl.) One of the dilatations of the body wall of Bryozoa in which the ova sometimes undergo the first stages of their development. See Illust. of chilostoma.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun zoology One of the dilatations of the body wall of Bryozoa in which the ova sometimes undergo the first stages of their development.