- sa•tur•ni•id[[t]səˈtɜr ni ɪd[/t]] n.1) pln any of several large, brightly colored moths of the family Saturniidae, characterized by feathery antennae and wings usu. having eyespots, comprising the giant silkworm moths2) ent belonging or pertaining to the family Saturniidae•Etymology: 1890–95; < NL Saturniidae name of the family. See Saturnian, -id II
From formal English to slang. 2014.