oogonium

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oogonium

 [o″o-go´ne-um]
[Gr.], a primordial oocyte during fetal development; near the time of birth it becomes a primary oocyte.

o·o·go·ni·um

, pl.

o·o·go·ni·a

(ō'ō-gō'nē-ŭm, -ă),
1. Primordial germ cells; proliferate by mitotic division. All oogonia develop into primary oocytes before birth occurs; no oogonia are present after birth.
2. In fungi, the female gametangium bearing one or more oospores.
[G. ōon, egg, + gonē, generation]

oogonium

(ō′ə-gō′nē-əm)
n. pl. oogo·nia (-nē-ə) or oogo·niums
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.

o′o·go′ni·al (-nē-əl) adj.

o·o·go·ni·um

, pl. oogonia (ō'ŏ-gō'nē-ŭm, -nē-ă)
1. Primordial germ cells; proliferate by mitotic division.
2. In fungi, the female gametangium bearing one or more oospores.
[G. ōon, egg, + gonē, generation]

oogonium

  1. an early DIPLOID (1) stage in GAMETOGENESIS of female animals giving rise to the OOCYTES.
  2. (in algae and fungi) the female sex organ containing the OOSPHERES.