(redirected from antheridia)
Also found in: Thesaurus, Medical, Encyclopedia.


n. pl. an·ther·id·i·a (-ē-ə)
A sperm-producing organ occurring in seedless plants, fungi, and algae.

[New Latin : anthēra, anther; see anther + -idium, diminutive suff. (from Greek -idion).]

an′ther·id′i·al adj.


(ˌænθəˈrɪdɪəm) or


n, pl -ridia (-ˈrɪdɪə) or -rids
(Botany) the male sex organ of algae, fungi, bryophytes, and spore-bearing vascular plants, such as ferns, which produces antherozoids
[C19: from New Latin, diminutive of anthēra anther]
ˌantherˈidial adj


(ˌæn θəˈrɪd i əm)

n., pl. -ther•id•i•a (-θəˈrɪd i ə)
a male reproductive structure producing gametes, occurring in ferns, mosses, fungi, and algae.
[1850–55; < New Latin]
an`ther•id′i•al, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.antheridium - the male sex organ of spore-producing plants; produces antherozoids; equivalent to the anther in flowers
reproductive structure - the parts of a plant involved in its reproduction
References in periodicals archive ?
Changes in the occurrence and ultrastructure of plasmodesmata in antheridia of Chara vulgaris L.
The Oospores were mixed with an antheridia suspension then the zygotes were swirled and allowed to settle.
Plerotic oospores with amphygenous antheridia were observed in laboratory crosses (Erwin and Ribeiro, 1996).
Antheridia and archegonia usually born in receptacles Marchantiopsida: Key 1 4.
Antheridia appeared 46-51 days after sowing, in both irregular and cordate individuals with no archegonia, i.
They were further examined for the number of antheridia and archegonia.
Based on morphological characterization, the foot rot pathogen exhibited globose oogonia with paragynous antheridia, chlamydospore, torulose hyphae and lemon shaped sporangia with long pedicel.
Identification was based on colony morphology, mycelial characteristics, cardinal growth temperatures, morphology and dimensions of sporangia, oogonia and antheridia as follows; Colony morphology and growth temperature: A 5-mm-diameter mycelial plug of each isolate was transferred to ACMA and incubated at 5, 24 and 35 [degrees]C for 7 days in the dark.
During this stage and after 20 days of culture, the male gametophytes developed antheridia, while fertilized female cells developed into zygotes that divided into 2 cells (an upper and lower one).