from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. defensive or repulsive, particularly as applied to glands of certain invertebrates, with which they produce poisonous or repugnant secretions when under threat.
from The Century Dictionary and Cyclopedia
- Repugnant; serving as a means of defense by repelling enemies: specific in the phrase.
From Latin repugnatorius (Wiktionary)