proemial
/roʊˈmiːəl, -ˈmiːəl/Definitions
1. adjective
Relating to or forming the introductory part of a poem or other work.
“The poet’s proemial stanza set the tone for the rest of the narrative poem.”
2. noun
The introductory part of a poem or other work, especially a poem of praise or honor.
“The proemial verse of the epic poem is a famous tribute to the hero.”