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Adapted for the observation of objects on land and on the earth; as, a terrestrial telescope, in distinction from an astronomical telescope. -- Ter*res"tri*al*ly, adv. -- Ter*res"tri*al*ness, n.

lackstone. -- Test object (Optics), an object which tests the power or quality of a microscope or telescope, by requiring a certain degree of excellence in the instrument to determine its existence or its peculiar texture or markings. -- Test paper. (a) (Chem.) Paper prepared for use in testing for certain substances…

Of or pertaining to the thermoscope; made by means of the thermoscope; as, thermoscopic observations.

he passage of a heavenly body over the meridian of a place, or through the field of a telescope.

-legged frame or stand, usually jointed at top, for supporting a theodolite, compass, telescope, camera, or other instrument. Tripod of life, or Vital tripod (Physiol.), the three organs, the heart, lungs, and brain; -- so called because their united action is necessary to the maintenance of life.

d ending in a bell. The middle part, bent double, slips into the outer parts, as in a telescope, so that by change of the vibrating length any tone within the compass of the instrument (which may be bass or tenor or alto or even, in rare instances, soprano) is commanded. It is the only member of the family of wind inst…

A telescope. "Glazed optic tube." Milton.

at intervals; to sparkle; to scintillate. These stars not twinkle when viewed through telescopes that have large apertures. Sir I. Newton. The western sky twinkled with stars. Sir W. Scott.

itude and azimuth instrument, the peculiarity of which is, that the object end of the telescope is placed at right angles to the eye end, with a prism of total reflection at the angle, and the eye end constitutes a portion of the horizontal axis of the instrument, having the eyepiece at the pivot and in the center of t…

Examination of the urethra by means of the urethroscope.

One who coins words. [R.] Southey gives himself free scope as a verbarian. Fitzed. Hall.

Sphere or scope of observation. Jer. Taylor. The public ministers that fell in my way. Sir W. Temple.

ally changes of atmospheric pressure, and hence changes of weather, as a barometer or baroscope. Poor man's weatherglass. (Bot.) See under Poor.

Of large scope; comprehensive; liberal; broad; as, wide views; a wide understanding. Men of strongest head and widest culture. M. Arnold.

One of the forked holders for supporting the telescope of a leveling instrument, or the axis of a theodolite; a wye.

(Astron.) See under Distance. -- Zenith sector. (Astron.) See Sector, 3. -- Zenith telescope (Geodesy), a telescope specially designed for determining the latitude by means of any two stars which pass the meridian about the same time, and at nearly equal distances from the zenith, but on opposite sides of it. It tur…

triæ, and corresponds to the cell wall of an ordinary cell. See Ovum, and Illust. of Microscope. (b) The zona radiata. -- Zona radiata Etym: [NL.] (Biol.), a radiately striated membrane situated next the yolk of an ovum, or separated from it by a very delicate membrane only.