Holometabolism, or complete metamorphosis, is where the insect changes all in four stages, an egg or embryo, a larva, a pupa, and the adult or imago.
From the en.wikipedia.org
Insects which undergo holometabolism pass through a larval stage, then enter an inactive state called pupa, or chrysalis, and finally emerge as adults.
From the en.wikipedia.org
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Complete metamorphosis in insects
Holometabolism, also called complete metamorphism, is a term applied to insect groups to describe the specific kind of insect development which includes four life stages - as an embryo or egg, a larva, a pupa and an imago or adult. ...
Complete metamorphosis in which a pupal stage occurs between the larval stage and the adult form. The pupa is inactive and looks very different from the adult.
Complete form of metamorphosis in which an insect passes through four separate stages of growth, as embryo, larva, pupa, and imago.