Source : Webster's Revised Unabridged Dictionary (1913)

Penultima \Pe*nul"ti*ma\, n. [L. (sc. syllaba), fr. penultimus,
   paenultimus, the last but one; paene almost + ultimus the
   last.]
   Same as {Penult}.

Source : WordNet®

penultima
     n : the next to last syllable in a word [syn: {penult}, {penultimate}]