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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.


relating to an archegonium
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.archegonial - of or relating to an archegonium
phytology, botany - the branch of biology that studies plants
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References in periodicals archive ?
The cytological features of the cells taking part in archegonial development and oogenesis in the fern Plagiogyrio euphlehia (Kunze) Mett.
At the micropylar end of the seed, the megagametophyte (sometimes erroneously called endosperm) is covered by the brown, papery left over of the nucellus (perisperm) and forms a cap over the archegonial chamber and radicle (Fig.
It may have been missed because the correct stage of archegonial development was not sectioned.
These cells surrounding the enlarging zygote (see the discussion of "spermocarp" in Smith, 1950) may develop invaginations indicative of nutrient transfer, as in the archegonial venter cells of lower embryophytes (cf.
The newly formed egg is closely appressed to the archegonial jacket cells.
Some prothalli showed an initial archegonial phase, which persisted throughout gametophyte development and the antheridial phase developed on separate thalli a few days later and persisted throughout the life span of the gametophytes.