Found 2 items, similar to terrestrial.
English → English (WordNet) Definition: terrestrial 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]
English → English (gcide) Definition: terrestrial eyepiece \eye"piece`\ eye-piece \eye"-piece`\, n. (Opt.) The lens, or combination of lenses, at the eye end of a microscope, telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed. Syn: ocular. [1913 Webster] 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 viewing terrestrial objects, consisting of three, or usually four, lenses, so arranged as to present the image of the object viewed in an erect position. [1913 Webster]