Tellurium \Tel*lu"ri*um\, n. [NL., from L. tellus, -uris, the
   earth.] (Chem.)
   A rare nonmetallic element, analogous to sulphur and
   selenium, occasionally found native as a substance of a
   silver-white metallic luster, but usually combined with
   metals, as with gold and silver in the mineral sylvanite,
   with mercury in Coloradoite, etc. Symbol Te. Atomic weight
   125.2.
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   Graphic tellurium. (Min.) See Sylvanite.

   Tellurium glance (Min.), nagyagite; -- called also black
      tellurium.
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