\Tel"e*scope\ (t[e^]l"[-e]*sk[=o]p), a.
Capable of being extended or compacted, like a telescope, by
the sliding of joints or parts one within the other;
telescopic; as, a telescope bag; telescope table, etc.

\Tel"e*scope\, n. [Gr. ? viewing afar, farseeing; ?
far, far off + ? a watcher, akin to ? to view: cf. F.
t['e]lescope. See {Telegraph}, and {-scope}.]
An optical instrument used in viewing distant objects, as the
heavenly bodies.
Note: A telescope assists the eye chiefly in two ways; first,
      by enlarging the visual angle under which a distant
      object is seen, and thus magnifying that object; and,
      secondly, by collecting, and conveying to the eye, a
      larger beam of light than would enter the naked organ,
      thus rendering objects distinct and visible which would
      otherwise be indistinct and or invisible. Its essential
      parts are the object glass, or concave mirror, which
      collects the beam of light, and forms an image of the
      object, and the eyeglass, which is a microscope, by
      which the image is magnified.
{Achromatic telescope}. See under {Achromatic}.
{Aplanatic telescope}, a telescope having an aplanatic
   eyepiece.
{Astronomical telescope}, a telescope which has a simple
   eyepiece so constructed or used as not to reverse the
   image formed by the object glass, and consequently
   exhibits objects inverted, which is not a hindrance in
   astronomical observations.
{Cassegrainian telescope}, a reflecting telescope invented by
   Cassegrain, which differs from the Gregorian only in
   having the secondary speculum convex instead of concave,
   and placed nearer the large speculum. The Cassegrainian
   represents objects inverted; the Gregorian, in their
   natural position. The Melbourne telescope (see Illust.
   under {Reflecting telescope}, below) is a Cassegrainian
   telescope.
{Dialytic telescope}. See under {Dialytic}.
{Equatorial telescope}. See the Note under {Equatorial}.
{Galilean telescope}, a refracting telescope in which the
   eyeglass is a concave instead of a convex lens, as in the
   common opera glass. This was the construction originally
   adopted by Galileo, the inventor of the instrument. It
   exhibits the objects erect, that is, in their natural
   positions.
{Gregorian telescope}, a form of reflecting telescope. See
   under {Gregorian}.
{Herschelian telescope}, a reflecting telescope of the form
   invented by Sir William Herschel, in which only one
   speculum is employed, by means of which an image of the
   object is formed near one side of the open end of the
   tube, and to this the eyeglass is applied directly.
{Newtonian telescope}, a form of reflecting telescope. See
   under {Newtonian}.
{Photographic telescope}, a telescope specially constructed
   to make photographs of the heavenly bodies.
{Prism telescope}. See {Teinoscope}.
{Reflecting telescope}, a telescope in which the image is
   formed by a speculum or mirror (or usually by two
   speculums, a large one at the lower end of the telescope,
   and the smaller one near the open end) instead of an
   object glass. See {Gregorian, Cassegrainian, Herschelian,
   & Newtonian, telescopes}, above.
{Refracting telescope}, a telescope in which the image is
   formed by refraction through an object glass.
{Telescope carp} (Zo["o]l.), the telescope fish.
{Telescope fish} (Zo["o]l.), a monstrous variety of the
   goldfish having very protuberant eyes.
{Telescope fly} (Zo["o]l.), any two-winged fly of the genus
   {Diopsis}, native of Africa and Asia. The telescope flies
   are remarkable for having the eyes raised on very long
   stalks.
{Telescope shell} (Zo["o]l.), an elongated gastropod
   ({Cerithium telescopium}) having numerous flattened
   whorls.
{Telescope sight} (Firearms), a slender telescope attached to
   the barrel, having cross wires in the eyepiece and used as
   a sight.
{Terrestrial telescope}, a telescope whose eyepiece has one
   or two lenses more than the astronomical, for the purpose
   of inverting the image, and exhibiting objects erect.

\Tel"e*scope\, a. [imp. & p. p. {Telescoped}; p. pr. &
vb. n. {Telescoping}.]
To slide or pass one within another, after the manner of the
sections of a small telescope or spyglass; to come into
collision, as railway cars, in such a manner that one runs
into another. [Recent]

\Tel"e*scope\, v. t.
To cause to come into collision, so as to telescope. [Recent]