periplum
/ˈpɛrɪpləm/poetic
noun
Originally and chiefly in the poetry of Ezra Pound: = periplus.
Origin
1940s; earliest use found in Ezra Pound (1885–1972), poet. Either from classical Latin periplum, accusative of periplūs, or alteration of periplus after Latin neuter nouns in -um.