The Collaborative International Dictionary of English v.0.48:

Fossil \Fos"sil\, a. [L. fossilis, fr. fodere to dig: cf. F.
   fossile. See Fosse.]
   1. Dug out of the earth; as, fossil coal; fossil salt.
      [1913 Webster]

   2. preserved from a previous geological age; as, fossil water
      from deep wells; -- usually implying that the object so
      described has had its substance modified by long residence
      in the ground, but also used (as with fossil water) in
      cases where chemical composition is not altered.
      [PJC]

   3. (Paleon.) Like or pertaining to fossils; contained in
      rocks, whether petrified or not; as, fossil plants,
      shells.
      [1913 Webster]

   Fossil copal, a resinous substance, first found in the blue
      clay at Highgate, near London, and apparently a vegetable
      resin, partly changed by remaining in the earth.

   Fossil cork, Fossil flax, Fossil paper, or Fossil
   wood, varieties of amianthus.

   Fossil farina, a soft carbonate of lime.

   Fossil ore, fossiliferous red hematite. --Raymond.
      [1913 Webster]

WordNet (r) 3.0 (2006):

fossil copal
    n 1: partly mineralized copal dug from the ground [syn:
         copalite, copaline, fossil copal]