Definition of antheridium in English:

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Pronunciation: /ˌanTHəˈridēəm/

noun (plural antheridia /-THəˈridēə/)

The male sex organ of algae, mosses, ferns, fungi, and other nonflowering 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.



Pronunciation: /-T͟Həˈridēəl/
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).

For editors and proofreaders

Syllabification: an·ther·id·i·um

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