O"o*sphere (?), n. [Gr. an egg + E. sphere.]

1. Bot.

An unfertilized, rounded mass of protoplasm, produced in an oogonium.

⇒ 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.



© Webster 1913.

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