archegonia

/AA1 R K IH0 G OW1 N Y AH0/
noun
  1. 1

    A multicellular reproductive structure that contains a large, non-motile gamete (egg cell), and within which an embryo will develop.

Antonyms

Source: https://en.wiktionary.org/wiki/archegonia, https://en.wiktionary.org/wiki/archegonium