ˈ ̷ ̷ˌ ̷ ̷ noun
: any of various nematodes that infest the lungs and air passages of mammals: as
a. : a member of the genus Dictyocaulus
b. : the swine lungworm ( Metastrongylus elongatus ) that causes bronchitis and serves as an intermediate host of the swine-influenza virus