Lewis & Short

nuptĭālis, e, adj. [nuptiae], of or belonging to a marriage, wedding-, nuptial: ludi, Plaut. Cas. 5, 1, 2: cena, id. Curc. 5, 2, 61; Suet. Calig. 25: dona, Cic. Clu. 9, 28: faces, id. ib. 6, 15; Hor. C. 3, 11, 33: carmina, Cat. 61, 12 al.
Hence, adv.: nuptĭā-lĭter, as at a wedding: Venus nuptialiter laeta, Mart. Cap. 6, § 705.