anthracitis
From LSJ
δειναὶ δ' ἅμ' ἕπονται κῆρες ἀναπλάκητοι → and after him come dread spirits of death that never miss their mark
Latin > English (Lewis & Short)
anthrăcītis: ĭdis, f., = ἀνθρακῖτις>,
I a kind of carbuncle, the coal-carbuncle, Plin. 37, 7, 27, § 99; in Sol. 37 fin. called an-thrăcĭas, ae, m., = ἀνθρακίας>.