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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 ?
They found that the gametophytes were potentially bisexual, but a neutral or alkaline pH favors the expression of archegonia. Growth responses of A.
Archegonia were always produced immediately under the notch.
They were further examined for the number of antheridia and archegonia. These, along with the sporophytes, were assigned a maturation stage (Longton and Green 1969) (Table 1).
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.
All species were unisexual and gametangia (initially archegonia) differentiated between day 50 and day 80.
The prothallus bears the female (archegonia) and male (antheridia) organs.