late 14c., hirnia, from Latin hernia "a rupture," related to hira "intestine," PIE *ghere- "gut, entrail" (see yarn). The re-Latinized spelling is from 17c. Related: Herniated (1879).
hernia her·ni·a (hûr'nē-ə)
n. pl. her·ni·as
The protrusion of an organ or other bodily structure through the wall that normally contains it.