noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A morbid, monstrous, or pathological growth or product; an abnormality in structure; a monstrosity. uncountable
2. 2
   inability to produce hybrids that are both viable and fertile wordnet
3. 3
   Racial deterioration through weak or ineffective sexual selection. archaic, uncountable

Etymology

From caco- + -genesis.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.