Lewis & Short

prōdĭgĭālis, e, adj. [prodigium].

  1. I. Unnatural, strange, wonderful, portentous, prodigious (post-class.): res, Amm. 25, 10, 1: caput, Claud. in Ruf. 2, 434: signa, Prud. Ham. 467.
    Adverb.: prodigiale canens, Stat. Th. 7, 403: cometes prodigiale rubens, Claud. Rapt. Pros. 1, 232.
  2. II. That averts bad omens (Plautin.): prodigialis Juppiter, Plaut. Am. 2, 2, 107.
    Adv.: prōdĭgĭā-lĭter, unnaturally, in a strange manner, prodigiously (poet. and in post-Aug. prose): variare rem unam, Hor. A. P. 29: accidere, Col. 3, 3, 3.