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

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

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

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

After impregnation the fertilized oosphere immediately surrounds itself with a cell-wall and becomes the oospore which by a process of growth forms the embryo of the new plant.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 by Various

In Coleochæte, the male cell is a round spermatozoid, and the female cell an oosphere contained in the base of a cell which is elongated into an open and hair-like tube called the trichogyne.

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

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