Antemeridianus, pen. prod. Adiectiuum. ab Antè & Meridies. Plin. Done before uoone.Antemeridianæ literæ.Cic.Written in the forenoone.Antemeridianus sermo.Cic.Antemon.A certaine saile of a shippe.
Lewis and Short: Latin dictionary
antĕ-mĕrīdĭānus, a, um, adj., before mid-day or noon: sermo, Cic. de Or. 3, 6: ambulatio, id. ib. 3, 30: litterae,