an appearance , form , image of a thing; an apparition , spectre , the Gr. εἴδωλον (much less freq. than simulacrum and species): spectra Catiana ... nam quae Democritus εἴδωλα, Catius Insuber Epicureus spectra nominat, Cic.Fam. 15, 16, 1 sq.: spectra Catiana, Cass. ap. Cic.Fam. 15, 19, 1.