Definition of prothalamium in English:

prothalamium

noun

literary
  • A song or poem celebrating a forthcoming wedding.

    • ‘John Ashbery, in ‘A Blessing in Disguise,’ has written a fast, sure prothalamion for the sometime wedding of oneself to the free friend, to poetry.’

Origin

Late 16th century: from Prothalamion, the title of a poem by Spenser, on the pattern of epithalamium.

Pronunciation:

prothalamium

/ˌprəʊθəˈleɪmɪəm/