ametabolous metamorphosis

ametabolous metamorphosis

[¦ā·mə¦tab·ə·ləs ‚med·ə′mȯr·fə·səs]
(invertebrate zoology)
A growth stage of certain insects characterized by an increase in size without distinct external changes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.