👉 Terebellum is a term used in the English language, commonly referring to an insect or small animal that has a long, slender body with a flattened head and two sets of antennae. It is also known as a tergite or a tergiform organ. Terebellums are typically found in the arachnids, including spiders, scorpions, and some species of crustaceans like crabs and lobsters.