O·o·sphere n.
1. Bot. An unfertilized, rounded mass of protoplasm, produced in an oogonium.
Note: ☞ After being fertilized by the access of antherozoids it becomes covered with a cell wall and develops into an oospore, which may grow into a new plant like the parent.
2. Bot. An analogous mass of protoplasm in the ovule of a flowering plant; an embryonic vesicle.
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oosphere
n : used especially of lower plants