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.