American Heritage® Dictionary of the English Language, Fourth Edition
- n. A sperm-producing organ occurring in seedless plants, fungi, and algae.
Century Dictionary and Cyclopedia
- n. 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.
GNU Webster's 1913
- n. (Bot.) The male reproductive apparatus in the lower plants, consisting of a cell or other cavity in which spermatozoids are produced; -- called also
- n. the male sex organ of spore-producing plants; produces antherozoids; equivalent to the anther in flowers
- New Latin : anthēra, anther; see anther + -idium, diminutive suff. (from Greek -idion). (American Heritage® Dictionary of the English Language, Fourth Edition)
“It is called an "antheridium," and within are produced, by internal division, numerous excessively small spermatozoids.”
“The male plant has no definite stem, and consists of a single concave leaf protecting the antheridium.”
“C. Longitudinal section of antheridium; st, stalk; w, wall.”
“_J_, a male prothallium, × 50. _an. _ an antheridium.”
“In both cases the prothallium is small, and often scarcely protrudes beyond the spore, and may be reduced to a single archegonium or antheridium (Fig. 71, _B_, _C_) with only one or two cells representing the vegetative cells of the prothallium (_v_).”
“If a ripe antheridium is crushed in a drop of water, after lying a few minutes the spermatozoids will escape through small openings in the side of the cells.”
“The antheridium undergoes no further change, but the archicarp soon divides into two cells, -- a small basal one and a larger upper cell.”
“In many species special zoöspores are formed, smaller than the ordinary ones, that attach themselves to the filaments bearing the female reproductive organ (oögonium), and grow into small plants bearing the male organ (antheridium), (Fig. 16, _B_).”
“The other branch (antheridium) grows up in close contact with the archicarp, and like it is shut off by a partition from its filament.”
These user-created lists contain the word ‘antheridium’.
List of terms used in the study and classification of pollen and spores - both fossil and modern.
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