chrys·a·lis 
(krĭsə-lĭs)
(krĭsə-lĭs)n. pl. chrys·a·lis·es or chry·sal·i·des (krĭ-sălĭ-dēz′)
1.
a. A pupa, especially of a butterfly.
b. The hardened case of a pupa.
2. A protected stage of development.
[Latin chrȳsallis, from Greek khrūsallis, khrūsallid-, gold-colored pupa of a butterfly, from khrūsos, gold; see CHRYSO-.]
chrysalisswallowtail chrysalis
Papilio machaon