noun, plural ar·che·go·ni·a [ahr-ki-goh-nee-uh] /ˌɑr kɪˈgoʊ ni ə/. Botany.
Origin of archegonium
Examples from the Web for archegonia
The archegonia are borne at the apex of the main stem or of a lateral branch.
The sexual organs are borne on the upper surface, and both antheridia and archegonia occur on the same branch (fig. 3, A).
The same moisture which caused the antheridia to open also brings about the opening of the archegonia.How to Know the Ferns|S. Leonard Bastin
Plants with cellular tissue only; both antheridia and archegonia borne upon the plant itself.
In addition special involucres around the archegonia have arisen independently in several series.