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, &and Newtonian, telescopes, above. Refracting telescope,
a telescope in which the image is formed by refraction through an object glass. Telescope carp
(Zoöl.), the telescope fish. Telescope fish (Zoöl.), a monstrous variety of the goldfish having very
protuberant eyes. Telescope fly (Zoöl.), 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 (Zoöl.), 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]
(Tel`e*scop"ic Tel`e*scop"ic*al) a. [Cf. F. télescopique.]
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
(Tel`e*scop"ic*al*ly), adv. In a telescopical manner; by or with the telescope.
(Te*les"co*pist) n. One who uses a telescope. R. A. Proctor.
(Te*les"co*py) n. The art or practice of using or making telescopes.
(Tel"esm) n. [Ar. tilism. See Talisman.] A kind of amulet or magical charm. [Obs.] J. Gregory.
(Tel`es*mat"ic Tel`es*mat"ic*al) a. Of or pertaining to telesms; magical. J. Gregory.
(Tel`e*spec"tro*scope) n. [Gr. far off + E. spectroscope.] (Astron.) A spectroscope
arranged to be attached to a telescope for observation of distant objects, as the sun or stars. Lockyer.
(Tel`e*ste"re*o*scope) n. [Gr. far off + E. stereoscope.] (Opt.) A stereoscope adapted
to view distant natural objects or landscapes; a telescopic stereoscope.
(Te*les"tic) a. [Gr. fit for finishing, from to finish.] Tending or relating to a purpose or an end.