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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 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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From: WordNet (r) 2.0

 oosphere
      n : used especially of lower plants