We don't have synonyms for aecidium yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are oncidium, lepidium and cercidium.
(n) :
(mycology) A member of the form genus Aecidium.
(n) :
The cupulate fruiting body borne upon the mycelium of certain fungi commonly parasitic upon specimens of the Compositae, Lamiaceae, Leguminosae, and Ranunculaceae families
(n) :
(mycology) A member of the form genus Aecidium.
(n) :
The cupulate fruiting body borne upon the mycelium of certain fungi commonly parasitic upon specimens of the Compositae, Lamiaceae, Leguminosae, and Ranunculaceae families