n 1  cap  :  a genus of widely distributed white-spored basidiomycetous fungi (family Amanitaceae) that includes some deadly poisonous forms (as the death cap)  2  :  a fungus of the genus Amanita .
 
   
 
Similar sounding terms:  am·bi·ent  ament   aminate  am·mo·ni·ate 
 
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