The term 'Arthropod' refers to a large group of invertebrate animals that have an exoskeleton, segmented bodies, and jointed appendages. This group includes the CENTIPEDE (9 letters), which has many legs and is usually found in moist environments; the INSECT (6 letters), which has three body parts and six legs; the CRUSTACEAN (10 letters), which has two pairs of antennae and five pairs of legs; the SPIDER (6 letters), which has eight legs and produces silk; and the ARACHNID (8 letters), which has eight legs and no antennae.