Telluric

a.
  1. Of or pertaining to the earth; proceeding from the earth.
  2. (Chem.) Of or pertaining to tellurium; derived from, or resembling, tellurium; specifically, designating those compounds in which the element has a higher valence as contrasted with tellurous compounds; as, telluric acid, which is analogous to sulphuric acid.
    3. Telluric bismuth (Min.),
    tetradymite.
    Telluric silver (Min.),
    hessite.