n. [Gr. kata, down; trepein, to turn]1. (ARTHROPODA: Insecta)In blastokinesis, the movement of the embryo inside the egg from one pole to another.2. Refers to different activities in different groups of insects, i.e., dorsal to ventral, ventral to dorsal.3. Decrease of movement during blastokinesis; see anatrepsis.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.