That does not undergo or exhibit metamorphosis (metamorphosis, n. 3a). Cf. ametabolic, adj.

Of an organism: that does not undergo metamorphosis (metamorphosis, n. 3a). Also: not involving or characterized by metamorphosis.

Zoology. That does not undergo or exhibit metamorphosis (metamorphosis, n. 3a); = ametabolous, adj. Cf. ametabolian, adj. Now somewhat rare.

Of the same form; = homomorphic, adj.

Of the same or similar form. (In sense 1c opposed to homologous; in other senses opposed to heteromorphic… Entomology. Said of insects in which…