məˌsistōˈsirəs noun
Usage: capitalized
Etymology: New Latin, from mecisto- (from Greek mēkistos, superl. of makros long) + cirrus — more at meager
: a genus of nematode worms (family Trichostrongylidae) including a common parasite ( M. digitatus ) of the abomasum of domesticated ruminants and the stomach of swine in both of which it may cause serious loss of blood and digestive disturbances especially in young animals