homobasidiomycetes: category used in some classification systems for various basidiomycetous fungi including e.g. mushrooms and puffballs which are usually placed in the classes Gasteromycetes and Hymenomycetes
class: (biology) a taxonomic group containing one or more orders
trip wire: a small military force that serves as a first line of defense; if they become engaged in hostilities it will trigger the intervention of stronger military forces