Source : Webster's Revised Unabridged Dictionary (1913)

Chrysalis \Chrys"a*lis\, n.; pl. {Chrysalides}. [L. chrysallis
   the gold-colored pupa of butterflies, Gr. ?, fr. ? gold. Cf.
   {Aurelia}.] (Zo["o]l.)
   The pupa state of certain insects, esp. of butterflies, from
   which the perfect insect emerges. See {Pupa}, and {Aurelia}
   (a) .

Source : WordNet®

chrysalis
     n : pupa of a moth or butterfly enclosed in a cocoon
     [also: {chrysalides} (pl)]