What is "ametabolian"

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

a. 1 (context zoology English) Of or pertaining to insects that undergo metamorphosis 2 (context zoology English) Of or pertaining to the Ametabola (Apterygota)