1) Brood chamber, zoologically 
• (n.) One of the dilatations of the body wall of Bryozoa in which the ova sometimes undegro the first stages of their development. See Illust. of Chilostoma.
O'vi·cell` noun [ Ovum + cell .] (Zoöl) One of the dilatations of the body wall of Bryozoa in which the ova sometimes undegro the first stages of their development. See Illust. of Chilostoma .