from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A morbid, monstrous, or pathological growth or product; an abnormality in structure; a monstrosity.
from The Century Dictionary and Cyclopedia
- n. In medicine, a morbid formation, whether congenital, as a monstrosity, or of later development, as a tumor.
- n. The quality, common in mixed breeds, of having a low vitality and of being infertile.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. inability to produce hybrids that are both viable and fertile
caco- + -genesis (Wiktionary)