Source : Webster's Revised Unabridged Dictionary (1913)

Holometabola \Hol`o*me*tab"o*la\, n. pl. [NL. See {Holo-}, and
   {Metabola}.] (Zo["o]l.)
   Those insects which have a complete metamorphosis; metabola.

Source : WordNet®

holometabola
     n : insects that undergo complete metamorphosis [syn: {metabola}]