Jet \Jet\, n. [OF. jet, jayet, F. ja[8b]et, jais, L. gagates,
      fr. Gr. [?]; -- so called from [?] or [?], a town and river
      in Lycia.] [written also {jeat}, {jayet}.] (Min.)
      A variety of lignite, of a very compact texture and velvet
      black color, susceptible of a good polish, and often wrought
      into mourning jewelry, toys, buttons, etc. Formerly called
      also {black amber}.
  
      {Jet ant} (Zo[94]l.), a blackish European ant ({Formica
            fuliginosa}), which builds its nest of a paperlike
            material in the trunks of trees.

English Dictionary: Jedem das Seine.

by the DICT Development Group