telescope
Cross references: 1. reflector 2. refractor 1. tele.scope \'tel-*-.sko-p\ n [NL telescopium, fr. Gk te-leskopos farseeing, fr. te-le-)X tele- + skipein to look - more at SPY 1: a usu. tubular optical instrument for viewing distant objects by means o f the refraction of light rays through a lens or the reflection of light rays by a concave mirror 2: any of various tubular magnifying optical instruments 3: RADIO TELESCOPE 2. telescope vi 1: to slide or pass one within another like the cylindrical sections of a hand telescope 2: to force a way into or enter another lengthwise as the result of collis ion 3: to become telescoped 1: to cause to telescope 2: COMPRESS, CONDENSE
Webster's English Dictionary