noun, plural o·o·go·ni·a [oh-uh–goh-nee-uh] /ˌoʊ əˈgoʊ ni ə/, o·o·go·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.
noun plural -nia (-nɪə) or -niums
- an immature female germ cell forming oocytes by repeated divisions
- a female sex organ of some algae and fungi producing female gametes (oospheres)
n. pl. o•o•go•ni•ums
- The primitive egg mother cell from which the oocytes develop.
Plural oogonia 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.