ametabolian

from The Collaborative International Dictionary of English v.0.48

Ametabolian \A*met`a*bo"li*an\, a. [Gr. ? unchangeable; 'a priv.
   + ? changeable, ? to change.] (Zool.)
   Of or pertaining to insects that do undergo any
   metamorphosis.
   [1913 Webster] Ametabolic