repugnatorial

(generally in combination as in: “repugnatorial glands”): defensive, or “fighting back”, in particular as applied to an ozadene, a gland that can release irritant, poisonous, alarming or distasteful fluids or gases when an organism is under threat. Examples of repugnatorial glands include the osmeterium of larvae of the Papilionidae, the stink glands of most Heteroptera, the ozadenes of Opiliones, the odoriferous glands of Diplopoda, and others. Some insects, such as larvae of many species of the Chrysomelidae, use their excreta in repugnatorial roles, for example covering themselves with their own frass.