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antheridium Line breaks: an¦ther|id¦ium
Pronunciation: /ˌanθəˈrɪdɪəm/

Definition of antheridium in English:

noun (plural antheridia ˌanθəˈrɪdɪə)

The male sex organ of algae, mosses, ferns, fungi, and other non-flowering plants.
Example sentences
  • Since the asexual gametophyte does not form antheridia or archegonia, crosses to confirm its genotype could not be performed.
  • The receptacles are reproductive branches and contain many cavities with external pores which contain antheridia and oogonia, then through meiosis, sperm and egg are produced.
  • Notwithstanding their general similarity, the archegonia of mosses differ externally from antheridia in having a longer neck and longer stalk.


Example sentences
  • The oogonial initial penetrates the antheridial initial and rapidly expands to form the oogonium.
  • Studies on development of antheridia and antheridial dehiscence have been conducted by Davie and Hartman.
  • The latter are much more abundant in the antheridial tufts, where they have somewhat swollen heads.


Mid 19th century: modern Latin, from anthera (see anther) + -idium (from the Greek diminutive suffix -idion).

Definition of antheridium in:
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