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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 ?
Antheridia and archegonia usually born in receptacles Marchantiopsida: Key 1 4.
Archegonia were always produced immediately under the notch.
They were further examined for the number of antheridia and archegonia.
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.
In Blechnum falciforme, archegonia were apparent by day 40; in B.
In Pellia, as in other liverworts, archegonia are produced on the upper side of the plant, in ferns on the lower side near the marginal blastozone (Figs.
1980), cellularize centripetally (form alveoli), and at sexual maturity consist of thousands of cells with several archegonia (Matten et al.