1. emerging or hatching from an egg or pupal case, especially of insects
Usage: biology, entomology; present participle of 'eclose'

Examples

• The butterfly is eclosing from its chrysalis after two weeks of development.
• Eclosing insects are vulnerable to predators during their first moments outside the pupal case.
• Scientists observed the moths eclosing simultaneously at dawn.
• The dragonfly nymph was eclosing from the water onto a nearby leaf.
• Eclosing beetles must wait for their exoskeletons to harden before they can fly.