chrysalis
n
(pl ~es)
1 form of an insect at the stage of its life when it changes from a grub to an adult insect, esp a butterfly or moth; pupa 蛹; (尤指)蝶蛹, 蛾蛹. =>illus at butterfly 见butterfly之插图.
2 hard case that encloses an insect during this stage 蛹壳.