from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The original localization of structures in an unsegmented embryo that become specific organs in the adult
from The Century Dictionary and Cyclopedia
- n. In embryology, the supposed original localization of the various organs of the adult, as specific substances or structures, in different regions of the unsegmented egg.
From pre- + localization (Wiktionary)