Eclosion

The process of hatching from the egg.

eclosion

Emergence of an insect from its old cuticle at a moult, particularly from pupa to adult.

Eclosion

Eclosion: The emergence of an adult insect from its pupal case, or the hatching of an insect larva from an egg. From the French éclosion, from éclore, to open.
Found on http://www.medterms.com/script/main/art.asp?articlekey=40205

Eclosion

Emergence of the adult or imago from the pupa
Found on http://www.earthlife.net/insects/glossary.html

eclosion

emergence, as from a larva or egg, or of an era or movement
Found on http://phrontistery.info/e.html
No exact match found