Exopterygota

The Exopterygota, also known as Hemipterodea, are a superorder of insects of the subclass Pterygota in the infraclass Neoptera, in which the young resemble adults but have externally-developing wings. They undergo a modest change between immature and adult, without going through a pupal stage. The nymphs develop gradually into adults through a process of moulting.
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Noun
1. subclass of insects characterized by gradual and usually incomplete metamorphosis
(synonym) subclass Exopterygota, Hemimetabola
(hypernym) class
(member-holonym) Insecta, class Insecta, Hexapoda, class Hexapoda