sa·tur·ni·id (sā-tûr'nē-ĭd, sə-) n. Any of various often large and colorful moths of the family Saturniidae, such as the emperor moth. adj. Of or belonging to the Saturniidae.
[From New Latin Sāturniidae, family name, from Sāturnia, type genus, from Latin, daughter of Saturn, from feminine of Sāturnius, Saturnian, from Sāturnus, Saturn; see Saturn.]