pomeridian
/ˌpəʊmɪˈrɪdɪən/adjective
Literary. Of or relating to the hours after midday; belonging to the afternoon. Frequently (and in earliest use) poetic as postpositive. Compare postmeridian. Occasionally also as noun: = postmeridian. Now rare.
Origin
Late 16th century; earliest use found in John Rolland (fl. 1528–1580), poet. From classical Latin pōmerīdiānus, variant of postmerīdiānus. Compare Italian pomeridiano.