n.
1.severe respiratory disease of birds that takes the form of an acute rapidly fatal pneumonia in young chickens and turkeys
2.an opportunistic infection by a fungus of the genus Aspergillus
3.disease especially in agricultural workers caused by inhalation of Aspergillus spores causing lumps in skin and ears and respiratory organs
Idiom of the Day
in the absence of (someone or something)
without someone or something
In the absence of any concrete plans for the building we decided to sell it.