Lewis & Short

Triptŏlĕmus, i, m., = Τριπτόλεμος, a son of Celeus, king of Eleusis and of Metanira; he was the inventor of agriculture, and became a judge in the infernal regions, Ov. F. 4, 507 sq.; id. Tr. 3, 8, 1; id. M. 5, 646 sq.; Auct. Her. 4, 6, 9; Cic. Tusc. 1, 41, 98; id. Verr. 2, 4, 49, § 110; Stat. S. 4, 2, 36; Hyg. Fab. 147.
Prov.: Triptolemo fruges dare, like the Engl. to carry coals to Newcastle, Ov. P. 4, 2, 10.
Hence, Triptŏlĕmĭcus, a, um, adj., of or belonging to Triptolemus, i. e. to husbandry, agricultural: dens, i. e. the plough, Fulg. Myth. prol. 1.