NOUN (1)

1. (prosody) a line of poetry having an extra syllable or syllables at the end of the last metrical foot;


ADJECTIVE (1)

1. (verse) having an extra syllable or syllables at the end of a metrically complete verse or in a metrical foot;

The Collaborative International Dictionary of English v.0.48:

Hypercatalectic \Hy`per*cat`a*lec"tic\, a. [L.
   hypercatalecticus, hypercatalectus, Gr. ?: cf. F.
   hypercatalectique. See Hyper-, and Catalectic.] (Pros.)
   Having a syllable or two beyond measure; as, a
   hypercatalectic verse.
   [1913 Webster]

WordNet (r) 3.0 (2006):

hypercatalectic
    adj 1: (verse) having an extra syllable or syllables at the end
           of a metrically complete verse or in a metrical foot
           [ant: acatalectic, catalectic]
    n 1: (prosody) a line of poetry having an extra syllable or
         syllables at the end of the last metrical foot