oosphere

American  

[oh-uh-sfeer] / ˈoʊ əˌsfɪər /

noun

Biology.

1. an unfertilized egg within an oogonium.

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oosphere British  

/ ˈəʊəˌsfɪə /

noun

1. a large female gamete produced in the oogonia of algae and fungi

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oosphere Scientific  

/ ō′ə-sfîr′ /

1. A large nonmotile female gamete formed in an oogonium, such as the eggs formed in the oogonium of an oomycete.

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Etymology

Origin of oosphere

First recorded in 1870–75; oo- + -sphere

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Example Sentences

See Examples For:

oosphere

Each protuberance bursts, and some of the spermatozoids come in contact with and are absorbed by the oosphere, which then secretes a cell-wall, and after a time germinates.

From Scientific American Supplement, No. 531, March 6, 1886 by Various

The protoplasm in one of these protuberances arranges itself into a round mass--the oosphere or female cell.

From Scientific American Supplement, No. 531, March 6, 1886 by Various

These are of the ordinary type of those organs, namely, a broad lower portion, containing a naked oosphere and a long narrow neck with a central canal leading to the oosphere.

From Scientific American Supplement, No. 531, March 6, 1886 by Various

The oogonia, unlike the Peronosporaceae, contain more than one oosphere.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" by Various

The sexual generation is a small green thalloid structure called a prothallium, which bears antheridia and archegonia, each archegonium having a neck-canal and oosphere, which is fertilized just as in the moss.

From Scientific American Supplement, No. 531, March 6, 1886 by Various

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