from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Biology The utilization of a structure or feature for a function other than that for which it was developed through natural selection.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The use of a biological structure or function for a purpose other than that for which it initially evolved.
ex- + (ad)aptation.(American Heritage® Dictionary of the English Language, Fourth Edition)