repugnatorial

Adjective

 * 1)  Defensive or repulsive, particularly as applied to glands of certain invertebrates, with which they produce poisonous or repugnant secretions when under threat.

Usage notes
Almost the only natural usage is among zoologists as a technical term in describing particular classes of glands and their defensive secretions, either repellent or actually harmful; [invertebrate] animals such as certain insects produce most of the typical examples. However, secretions of other animals such as skunks also are described as repugnatorial.