Source : Webster's Revised Unabridged Dictionary (1913)

Telescopic \Tel`e*scop"ic\, Telescopical \Tel`e*scop"ic*al\, a.
   [Cf. F. t['e]lescopique.]
   1. Of or pertaining to a telescope; performed by a telescope.

   2. Seen or discoverable only by a telescope; as, telescopic
      stars.

   3. Able to discern objects at a distance; farseeing;
      far-reaching; as, a telescopic eye; telescopic vision.

   4. Having the power of extension by joints sliding one within
      another, like the tube of a small telescope or a spyglass;
      especially (Mach.), constructed of concentric tubes,
      either stationary, as in the telescopic boiler, or
      movable, as in the telescopic chimney of a war vessel,
      which may be put out of sight by being lowered endwise.

Source : WordNet®

telescopic
     adj 1: visible only with a telescopic; "a bright star with a
            telescopic companion"
     2: capable of discerning distant objects; "a telescopic eye";
        "telescopic vision"
     3: having parts that slide one within another; "a telescopic
        antenna"; "a telescopic drinking cup"