hypermetamorphosis

from The Century Dictionary.

• noun In entomology, complete metamorphosis; radical transformation; change from one form to a very different one. See hypermetamorphism.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Zoöl.) A kind of metamorphosis, in certain insects, in which the larva itself undergoes remarkable changes of form and structure during its growth.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun biology A kind of complete metamorphosis in which the different larval instars represent two or more different forms of larva.
• noun neurology An excessive visual exploration of environment