A beetle whose defence mechanism enables it to eject a hot aqueous mixture of chemicals at predators. They come from a number of subfamilies: Carabinae (e.g., Brachinus crepitans), Metriinae (e.g., Stenaptinus insignis) and Paussinae (e.g., Goniotropis nicaraguensis)
Any of various beetles of the genus Brachinus and related genera that expel an acrid, volatile secretion from the abdomen when disturbed, making an audible sound