† eˈgagropileObs. [a. Fr.égagropilef.Gr. αἴγαγρο-ς wild goat + πῖλος felted hair.] See quot. 1811W. Walton Peruvian Sheep 97 The egagropiles, or hairballs, taken from the inside of horned cattle.Ibid. 99 In the Llama they [concretions] rather become egagropiles.