Définitions
1.NounThe cupulate fruiting body borne upon the mycelium of certain fungi commonly parasitic upon specimens of the Compositae, Lamiaceae, Leguminosae, and Ranunculaceae families
2.NounA member of the form genus Aecidium.
3.Noun↑ “æcidium” listed in the Oxford English Dictionary, second edition, 1989
4.Noun↑ listed in the online Merriam-Webster. Retrieved 4 June 2018.