Terrestrial : adj
1: of or relating to or inhabiting the land as opposed to the
sea or air [syn: tellurian, telluric, terrene]
2: of or relating to or characteristic of the planet Earth or
its inhabitants; "planetary rumblings and eructations"-
L.C.Eiseley ; "the planetary tilt"; "this terrestrial
ball" [syn: planetary]
3: operating or living or growing on land [syn: land(a)]
[ant: amphibious, aquatic]
4: concerned with the world or worldly matters; "mundane
affairs"; "he developed an immense terrestrial
practicality" [syn: mundane]
5: of this earth; "transcendental motives for sublunary
actions"; "fleeting sublunary pleasures"; "the nearest to
an angelic being that treads this terrestrial ball" [syn:
sublunar, sublunary]
Based on WordNet 2.0
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Terrestrial : \Ter*res"tri*al\, n.
An inhabitant of the earth.
Based on Webster's Revised Unabridged Dictionary
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Terrestrial : \Ter*res"tri*al\, a. [L. terrestris, from terra the
earth. See Terrace.]
1. Of or pertaining to the earth; existing on the earth;
earthly; as, terrestrial animals. ``Bodies terrestrial.''
--1 Cor. xv. 40.
2. Representing, or consisting of, the earth; as, a
terrestrial globe. ``The dark terrestrial ball.''
--Addison.
3. Of or pertaining to the world, or to the present state;
sublunary; mundane.
Vain labors of terrestrial wit. --Spenser.
A genius bright and base, Of towering talents, and
terrestrial aims. --Young.
4. Consisting of land, in distinction from water; belonging
to, or inhabiting, the land or ground, in distinction from
trees, water, or the like; as, terrestrial serpents.
The terrestrial parts of the globe. --Woodward.
5. 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.
Based on Webster's Revised Unabridged Dictionary
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Eyepiece \Eye"piece`\, n. (Opt.)
The lens, or combination of lenses, at the eye end of a
telescope or other optical instrument, through which the
image formed by the mirror or object glass is viewed.
Collimating eyepiece. See under Collimate.
Negative, or Huyghenian, eyepiece, an eyepiece
consisting of two plano-convex lenses with their curved
surfaces turned toward the object glass, and separated
from each other by about half the sum of their focal
distances, the image viewed by the eye being formed
between the two lenses. it was devised by Huyghens, who
applied it to the telescope. Campani applied it to the
microscope, whence it is sometimes called Campani's
eyepiece.
Positive eyepiece, an eyepiece consisting of two
plano-convex lenses placed with their curved surfaces
toward each other, and separated by a distance somewhat
less than the focal distance of the one nearest eye, the
image of the object viewed being beyond both lenses; --
called also, from the name of the inventor, Ramsden's
eyepiece.
terrestrial, or Erecting eyepiece, an eyepiece used in
telescopes for viewingTerrestrial : objects, consisting of
three, or usually four, lenses, so arranged as to present
the image of the object viewed in an erect position.
Based on Webster's Revised Unabridged Dictionary (1913)
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