The Collaborative International Dictionary
AEcidium \[AE]*cid"i*um\, n.; pl. [AE]cidia. [NL., dim. of Gr. ? injury.] (Bot.) A form of fruit in the cycle of development of the Rusts or Brands, an order of fungi, formerly considered independent plants.
Wiktionary
n. 1 The cupulate fruiting body borne upon the mycelium of certain fungi commonly parasitic upon specimens of the Compositae, Lamiaceae, Leguminosae, and Ranunculaceae family 2 (context mycology English) A member of the form genus ''Aecidium''.
Wikipedia
Aecidium is a genus of rust fungi in the Pucciniales order. The widespread genus is estimated to contain about 600 species.
Usage examples of "aecidium".
Porlieria hygrometrica, circumnutation and nyctitropic movements of petiole of leaf, 335, 336 --, effect of watering, 336338 --, leaflets closed during the day, 413 Portulaca oleracea, effect of Aecidium on, 189 Primula Sinensis, conjoint circumnutation of hypocotyl and cotyledon, 45, 46 Pringsheim on the injury to chlorophyll, 446 Prosopis, nyctitropic movements of leaflets, 374 Psoralea acaulis, nocturnal movements of leaflets, 354 Pteris aquilina, rachis of, 86 Pulvini, or joints.