ˌpərd.əˈsa(a)rēə noun
Usage: capitalized
Etymology: New Latin, from Latin pertusus (past participle of pertundere to bore through) + New Latin -aria — more at pierce
: a large widely distributed genus (the type of the family Pertusariaceae) of crustose lichens that have the fruiting bodies in structures resembling knobs and that are one of the sources of litmus and archil — compare roccella