Entry 1 sense Webster, 1913 Iulidan · I·u·li·dan · IPA 01 n. One of the Iulidæ, a family of myriapods, of which the genus Iulus is the type. See Iulus. 1. One of the Iulidæ, a family of myriapods, of which the genus Iulus is the type. See Iulus.(Zool.) See: Iulus