Lewis & Short

īlĕos, i, m., = εἰλεός, a severe kind of colic, the iliac pains, Plin. 30, 7, 20, § 59; 20, 6, 23, § 53; 32, 9, 31, § 101 al. (in Cels. 4, 13, written as Greek, called intestinorum tormentum, Cael. Aur. Acut. 3, 17, 138).