IPA: /ˈpjuːpəriəm/
KK: /pjuˈpɛəriəm/
A protective case that surrounds a pupa during its development, often made from the skin of the larva.
The fly emerged from its puparium after several days of transformation.
Puparium is derived from the Latin "pupa" (meaning doll or larva) and the suffix "-arium" (meaning a place for). The term refers to a place or case where a larva develops into an adult insect, akin to a protective casing or environment for the pupa stage.
Think of a 'doll' ('pupa') that is in a special 'place' ('-arium') where it transforms into something new. This helps you remember that a puparium is a protective case for a developing insect.
No commonly confused words.