What is "oosphere"

Oosphere \O"["o]*sphere\ ([=o]"[-o]*sf[=e]r), n. [Gr. w,'o`n an egg + E. sphere.]

1. (Bot.) An unfertilized, rounded mass of protoplasm, produced in an o["o]gonium.

   Note: After being fertilized by the access of antherozoids it becomes covered with a cell wall and develops into an o["o]spore, 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.
   --Goodale.

n. (context botany English) A large nonmotile egg cell formed in an oogonium and ready for fertilization

n. used especially of lower plants