o·o·go·ni·um

(ō′ə-gō′nē-əm)

n. pl. o·o·go·ni·a (-nē-ə) or o·o·go·ni·ums

1. Any of the cells that give rise through mitosis to the oocytes and are found in the ovaries of vertebrates.

2. A female reproductive structure in certain thallophytes and in oomycetes, usually a rounded cell or sac containing one or more oospheres.

[oo- + New Latin gonium, cell (from Greek gonos, seed; see gono-).]

o′o·go′ni·al (-nē-əl) adj.

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.

oogonium

(ˌəʊəˈɡəʊnɪəm)

n, pl -nia (-nɪə) or -niums

1. (Biology) an immature female germ cell forming oocytes by repeated divisions

2. (Botany) a female sex organ of some algae and fungi producing female gametes (oospheres)

ooˈgonial adj

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

o•o•go•ni•um

(ˌoʊ əˈgoʊ ni əm)

n., pl. -ni•a (-ni ə) -ni•ums.

1. one of the undifferentiated germ cells giving rise to oocytes.

2. the one-celled female reproductive organ in certain fungi, usu. a spherical sac containing one or more eggs.

[1865–70]

o`o•go′ni•al, adj.

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References in periodicals archive

The DUSP4 protein was essential in the process of endoderm generating spermatogonium or oogonium (Brown et al., 2008).

The Predicted Target Genes of miR-122/449a Validation and Effects on Sertoli Cells Proliferation

CA, cortical alveoli; AF, atretic follicle; BM, basement membrane; F, follicle cell; FG, full-grown oocyte; LO, leptotene oocytes; N, nucleus; NU, perinuclear nucleoli; OF, ovarian follicle; OG, oogonium; OL, ovarian lumen; PF, prefollicle cells; PG, primary growth oocyte; PO, pachytene oocyte; SG, secondary growth oocyte; Y, yolk globule; ZP, zona pellucida.

Ovarian histology and fecundity in the evaluation of the reproduction of the invasive species Serrasalmus marginatus (Characidae) on a neotropical floodplain/Histologia ovariana e fecundidade na avaliacao da reproducao da especie invasora Serrasalmus marginatus (Characidae) em uma planicie de inundacao neotropical

Oogonium contains a relatively large nucleus (8.0 [micro]m) with a conspicuous nuclear membrane and characterized by only a single eccentrally located nucleolus as shown in Fig.(3, b, d & f|).

Evaluation the quality of the oil waste histological changes in the ovaries of the whipfin fish, Gerres filamentosus (Cuvier, 1829) during the reproductive cycle in the Hurghada Red Sea, Egypt

Majority of 16.16 to 69.53 46.18 [+ or -] oocytes are [micro]m 13.13 oogonium nests, and large oocytes have a large nucleus with a narrow homogenous cytoplasm.

Oocyte development and fecundity type of the Brazilian Snapper Lutjanus alexandrei Moura & Lindeman, 2007 (Perciformes: Lutjanidae)/Desenvolvimento ovocitario e tipo de fecundidade da bauna de fogo Lutjanus alexandrei Moura & Lindeman, 2007 (Perciformes: Lutjanidae)

Follicles form when the oogonium associates with follicular cells.

The Female Reproductive System of Zearaja chilensis (Guichenot, 1848) (Chondrichthyes, Rajidae). Gametogenesis and Microscopic Validation of Maturity Criteria/ El Sistema Reproductor Femenino de Zearaja chilensis (Guichenot, 1848) (Chondrichthyes, Rajidae). Gametogenesis y Validacion Microscopica de los Criterios de Madurez

There are 5 ovarian stages during the ovarian development cycle: stage I, before puberty molting and with a triangular pleonal flap, with the ovary mainly include oogonium; stage II, the ovary is milky white and comprised mainly of previtellogenic oocytes and endogenous vitellogenic oocytes; stage III, the ovary is light yellow or tan and comprised primarily of exogenous vitellogenic oocytes and endogenous vitellogenic oocytes; stage IV, the ovary is deep purple and comprised mainly of nearly mature oocytes and exogenous vitellogenic oocytes; and stage V: the ovary is chocolate brown and comprised mainly of mature oocytes.

Immunorecognition and distribution of progesterone receptors in the Chinese mitten crab Eriocheir sinensis during ovarian development

In humans, primordial germ cells or oogonium are the first stage of development into ovums, or mature eggs.

Eggs recreated in vitro to treat infertility