2 English words descend from Ancient Greek αἰκίᾱ, most common first.
aecidiumThe cupulate fruiting body borne upon the mycelium of certain fungi commonly parasitic upon specimens of the Compositae, Lamiaceae, Leguminosae, and Ranunculaceae families
aeciumA cuplike fruiting structure of some parasitic rust fungi that contains chains of aeciospores.