• WordNet 3.6
    • n antheridium the male sex organ of spore-producing plants; produces antherozoids; equivalent to the anther in flowers
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Webster's Revised Unabridged Dictionary
    • n Antheridium (Bot) The male reproductive apparatus in the lower plants, consisting of a cell or other cavity in which spermatozoids are produced; -- called also spermary.
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Century Dictionary and Cyclopedia
    • n antheridium In botany, the organ in cryptogamic plants which answers to the anther in the phanerogamic series. It assumes various forms and positions in the different groups. Also called antherid.
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Chambers's Twentieth Century Dictionary
    • n Antheridium an-ther-id′i-um the male reproductive organs of many cryptogams, as ferns, horse-tails, mosses, &c.
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Webster's Revised Unabridged Dictionary
Anther, + (a Gr. diminutive ending)
Chambers's Twentieth Century Dictionary
L. anthera, and -idium, Gr. dim. ending.


In literature:

C. Longitudinal section of antheridium; st, stalk; w, wall.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3" by Various
It is called an "antheridium," and within are produced, by internal division, numerous excessively small spermatozoids.
"Elements of Structural and Systematic Botany" by Douglas Houghton Campbell
These particles become globose cells, grouped in the centre of the antheridium.
"Fungi: Their Nature and Uses" by Mordecai Cubitt Cooke
A bursting antheridium, and some of the accompanying jointed threads, highly magnified.
"The Elements of Botany" by Asa Gray