IPA: /ɪˈkloʊʒən/
KK: /ɪˈkloʊʒən/
The process when an adult insect comes out from its pupal case or when a larva hatches from an egg.
The eclosion of the butterfly took place early in the morning.
Eclosion is derived from the Latin "eclodere" (meaning to break out or hatch), which is formed from "ex-" (meaning out) and "claudere" (meaning to close). The word describes the process of an organism breaking out of its shell or casing, particularly in reference to insects hatching from eggs.
Think of an organism 'breaking out' ('ex-') from something that was 'closed' ('claudere') — that's why eclosion refers to the hatching process.