archegonium
Concise Oxford English Dictionary © 2008 Oxford University Press:
archegonium /ˌɑːkɪˈgəʊnɪəm/
▶noun (pl. archegonia /-ɪə/) Botany the female sex organ in mosses, liverworts, ferns, and most conifers.
– origin C19: mod. L., from Gk arkhegonos, from arkhe- ‘chief’ + gonos ‘race’.
'archegonium' also found in these Oxford entries:

