Lewis Short
hēmĕrŏdrŏmus (noun M) = ἡμεροδρόμος: (who runs the day through)
* A courier (pure Lat. cursor, Plin. 2, 71, 73, § 181): nisi speculator (hemerodromos vocant Graeci) ingens die uno cursu emetiens spatium, etc.,Liv. 31, 24, 4.—In plur.: hemerodromoe,Nep. Milt. 4, 3.
Charlton T. Lewis, Charles Short, A Latin Dictionary