antheridia

/AE1 N TH ER0 IH1 D IY0 AH0/
noun
  1. 1

    An organ producing male gametes called antherozoids, found in some algae, ferns, and bryophytes.

Source: https://en.wiktionary.org/wiki/antheridia, https://en.wiktionary.org/wiki/antheridium