Tel`e*phon"ic*al*ly (?), adv. By telephonic means or processes; by the
use of the telephone.
Te*leph"o*ny (?), n. The art or process of reproducing sounds at a
distance, as with the telephone.
Tel`e*po*lar"i*scope (?), n. [Gr. &?; far off + E. polariscope.] (Opt.)
A polariscope arranged to be attached to a telescope. Lockyer.
Tel`e*ryth"in (?), n. [Gr. &?; end + E. erythrin.] (Chem.) A red
crystalline compound related to, or produced from, erythrin. So called
because regarded as the end of the series of erythrin compounds.
Tel"e*scope (?), n. [Gr. &?; viewing afar, farseeing; &?; far, far off
+ &?; a watcher, akin to &?; to view: cf. F. télescope. See Telegraph,
and -scope.] An optical instrument used in viewing distant objects, as
the heavenly bodies.
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 (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.