An Etymological Dictionary of Astronomy and Astrophysics

The reappearance of a celestial body after an eclipse, an occultation, or a transit; same as emersion. → ingress.

Etymology (EN): From L. egressus, from egredi “to go out,” from → ex- “out”

• -gredi, comb. form of gradi “to walk, go, step;” from PIE *ghredh- (cf. Lith. gridiju “to go, wander,” O.C.S. gredo “to come”).

Etymology (PE): Osgâm “going out,” from os- “out,” → ex-, + gâm “step, pace,” Mid.Pers. gâm, O.Pers. gam- “to come; to go,” Av. gam- “to come; to go,” jamaiti “goes,” Mod.Pers. âmadan “to come,” Skt. gamati “goes,” Gk. bainein “to go, walk, step,” L. venire “to come,” Tocharian A käm- “to come,” O.H.G. queman “to come,” E. come; PIE root *gwem- “to go, come.”