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oogonium

[oh-uh-goh-nee-uhm]

noun, plural -ni·a

[-nee-uh] , -ni·ums. Biology.

one of the undifferentiated germ cells giving rise to oocytes.

the one-celled female reproductive organ in certain thallophytes, usually a more or less spherical sac containing one or more eggs.

Origin:
1865–70; < Neo-Latin; see oo-, -gonium

Related forms

o·o·go·ni·al, adjective

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Oogonium is always a great word to know.

So is ally. Does it mean:

the continuous sequence of changes undergone by an organism from one primary form, as a gamete, to the development of the same form again

a plant, animal, or other organism bearing an evolutionary relationship to another, often as a member of the same family

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Collins

World English Dictionary

oogonium (ˌəʊəˈɡəʊnɪəm)

—n , pl -nia, -niums
1.	an immature female germ cell forming oocytes by repeated divisions
2.	a female sex organ of some algae and fungi producing female gametes (oospheres)

oo'gonial

—*adj*

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage

Medical Dictionary

oogonium o·o·go·ni·um (ō'ə-gō'nē-əm)
n. pl. o·o·go·ni·ums or o·o·go·ni·a (-nē-ə)
The primitive egg mother cell from which the oocytes develop.

o'o·go'ni·al (-nē-əl) adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage

Science Dictionary

oogonium

(ō'ə-gō'nē-əm) Pronunciation Key
Plural oogonia or oogoniums

A female reproductive structure in certain algae and fungi. It is usually a rounded cell or sac containing one or more oospheres.
A cell that arises from a primordial germ cell and differentiates into an oocyte in the ovary of female animals.

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Related Words

oosphere

oospore

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