
gradual growth of an arthropod that involves change in size, but not form.
Found on
http://www.encyclo.co.uk/local/20003

The development of a nymph into the imago which in many respects resembles the former; characteristic of more primitive insect orders, such as Heteroptera (true bugs), Orthoptera (locusts, grasshoppers), and Blatterria (roaches). ... Synonym: heterometabolous metamorphosis. ... (05 Mar 2000) ...
Found on
http://www.encyclo.co.uk/local/20973

Similar to gradual metamorphosis but generally used to denote the growth changes of naiads.
Found on
http://www.encyclo.co.uk/visitor-contributions.php

Type: Term Definitions: 1. the development of a nymph into the imago, which in many respects resembles the former; characteristic of more primitive insect orders, such as Heteroptera (true bugs), Orthoptera (locusts, grasshoppers), and Blatterria (roaches). Synonyms: heterometabolous metamorphosis
Found on
http://www.medilexicon.com/medicaldictionary.php?t=54629

a type of metamorphosis in which an insect hatches from an egg and then goes through several similar nymphal stages before reaching adulthood.
Found on
https://www.amentsoc.org/insects/glossary/begins/with/i/
No exact match found.