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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.


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


(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.
o`o•go′ni•al, adj.
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References in periodicals archive ?
At this stage, PRs were localized primarily in follicle cells (strongly positive) and the cytoplasm of oogonium (moderately positive; Fig.
In humans, primordial germ cells or oogonium are the first stage of development into ovums, or mature eggs.
The presence of oocytes, from oogonium to hydrated oocytes, was observed on the histological analyses, characterizing multiple spawning, and the monthly distribution of gonad stages indicated higher percentage of females on ripe and spent through November to April (Fig.