The Collaborative International Dictionary
Epithalamiums
Epithalamium \Ep`i*tha*la"mi*um\, n.; pl. Epithalamiums, L. Epithalamia. [L., fr. Gr. ?, orig. an adj., nuptial; 'epi` upon, at + ? bride chamber.] A nuptial song, or poem in honor of the bride and bridegroom.
The kind of poem which was called epithalamium . . .
sung when the bride was led into her chamber.
--B.
Jonson.
Wiktionary
epithalamiums
n. (plural of epithalamium English)