o·o·sphere

(ō′ə-sfîr′)

A nonmotile female gamete formed in the oogonium of an alga, fungus, oomycete, or bryophyte.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

oosphere

(ˈəʊəˌsfɪə)

(Botany) a large female gamete produced in the oogonia of algae and fungi

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

oosphere - a gamete; used especially of lower plants

gamete - a mature sexual reproductive cell having a single set of unpaired chromosomes

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References in periodicals archive

Accumulations of charophyte calcified oospheres, the gyrogonites, were previously usually interpreted as indicators of lowered salinity, however, many charophyte species from the Devonian sections have been found to be associated with typical marine assemblages, showing that the first representatives of the Charophyta were adapted to a wider variety of sedimentary environments than their modern relatives (Georgescu & Braun 2006).

Taphonomy of the vertebrate bone beds from the Klunas fossil site, Upper Devonian Tervete Formation of Latvia/Ulem-Devoni Tervete kihistu vertebraatide tafonoomia Klunase leiukohas Latis

The megaspore, still joined to the megasporocarp, germinates and develops into a prothallus that produces female gametes (oospheres).

Azolla: a review of its biology and utilization

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