cacuminal

from WordNet (r) 3.0 (2006)

cacuminal
    adj 1: pronounced with the tip of the tongue turned back toward
           the hard palate [syn: {cacuminal}, {retroflex}]

from The Collaborative International Dictionary of English v.0.48

Cacuminal \Ca*cu"mi*nal\, a. [L. cacumen, cacuminis, the top,
   point.] (Philol.)
   Pertaining to the top of the palate; cerebral; -- applied to
   certain consonants; as, cacuminal (or cerebral) letters.
   [1913 Webster]