Ametabolism is a type of growth or life cycle in insects in which there is slight or no metamorphosis, only a gradual increase in size. It is present only in primitive wingless insects: the orders Archaeognatha and Zygentoma.McGavin, George C. Essential Entomology: An Order-by-Order Introduction. Oxford: Oxford University Press, 2001. pp. 20.
See also Hemimetabolism Holometabolism
References
External links http://www.biology-online.org/dictionary/Ametabolism https://en.wiktionary.org/wiki/ametabolic