What is "hypermetamorphosis"

Hypermetamorphosis \Hy`per*met`a*mor"pho*sis\, n. [Hyper- + metamorphosis.] (Zo["o]l.) A kind of metamorphosis, in certain insects, in which the larva itself undergoes remarkable changes of form and structure during its growth.

n. 1 (context biology English) A kind of complete metamorphosis in which the different larval instars represent two or more different forms of larva. 2 (context neurology English) An excessive visual exploration of environment

Hypermetamorphosis is a term used in entomology that refers to a class of variants of holometabolism, that is to say, complete insect metamorphosis, but where some larval instars are distinct from each other.