Ep′i‐tha‐la″mi‐um (?), n.; pl.Epithalamiums (#), L. Epithalamia (#). [L., fr. Gr. �, orig. an adj., nuptial; επἴ 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.