Definition of antheridium in English:


nounplural noun antheridia/-THəˈridēə/

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

    ‘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.’
    • ‘Fern gametes are free-swimming and a thin film of water is required for the male gametes to travel from the antheridia into the neck of the archcgonia to fertilize the eggs.’
    • ‘The parent also contains antheridia which produce sperm and an oogonium which produces the egg.’



/ˌanTHəˈridēəm/ /ˌænθəˈrɪdiəm/


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