anthracite
an.thra.cite \'an(t)-thr*-.si-t\ \.an(t)-thr*-'sit-ik\ n [L anthracites, a bloodstone, fr. Gk anthrakite-s, fr. anthra]k-, anthrax : a hard natural coal of high luster differing from bituminous coal in con taining little volatile matter - an.thra.cit.ic aj