From ZooTerms (Dictionary of Invertebrate Zoology)
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histogenesis (noun and adjective; Greek histos, tissue; genesis, beginning): 1. The formation and development of tissues from the undifferentiated cells of the germ layers of the embryo.

2. (Arthropoda: Insecta) In holometabolic forms, histogenesis follows after histolysis of larval organs during the quiescent late larval or pupal stadia

See also: histolysis