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n. pl. ar·che·go·ni·a (-nē-ə)
A multicellular, often flask-shaped, egg-producing organ occurring in mosses, liverworts, ferns, and most gymnosperms.

[New Latin, from Greek arkhegonos, original : arkhe-, arkhi-, archi- + gonos, offspring; see genə- in Indo-European roots.]

ar′che·go′ni·al adj.
ar′che·go′ni·ate (-ĭt) adj.


n, pl -nia (-nɪə)
(Botany) a female sex organ, occurring in mosses, spore-bearing vascular plants, and gymnosperms, that produces a single egg cell in its swollen base
[C19: from New Latin, from Greek arkhegonos original parent, from arkhe- chief, first + gonos seed, race]
ˌarcheˈgoniate adj


(ˌɑr kɪˈgoʊ ni əm)

n., pl. -ni•a (-ni ə)
a flask-shaped female reproductive organ of ferns, mosses, and most gymnosperms that contains the gamete.
ar`che•go′ni•al, ar`che•go′ni•ate (-ni ɪt, -ˌeɪt) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.archegonium - a female sex organ occurring in mosses, ferns, and most gymnosperms
plant organ - a functional and structural unit of a plant or fungus
References in periodicals archive ?
The prothalli were bisexual although the antheridia and archegonia occurred on each prothallus asynchronously.
However, the female gametophyte of angiosperms might better be characterized as containing two not one archegonia, since in its reduction, whatever else is lost, an egg-producing structure (archegonium) must remain.
Gametophytes first produced antheridia and archegonia after seven weeks of culture.
Second, these gametophytes produced archegoniophores that elevated archegonia above the substrate.
Archegonia were located on the ventral surface near the apical notch (Fig.
a large number of archegonia (200+), and the male gametophyte produces
Antheridia were found in all three species, but archegonia were observed only on mature prothalli of C.
to 100 or more archegonia per megametophtye, though only a few are
implies the development of gametophytes that produce male and female gametes in the sexual organs, archegonia and antheridia, which form a sexual embryo through fertilization.
Each gametophyte was also scored for the number of antheridia and archegonia present.
In addition, gametophytes growing on soil frequently produce archegonia, whereas those growing on rock have high gemmae production (Farrar, 1978).
After 8 to 9 weeks, archegonia had developed on the lower surface of the gametophytes just behind the growing apex.