arthropod

1. N any invertebrate of the phylum Arthropoda, having jointed limbs, a segmented body, and an exoskeleton made of chitin. The group includes the crustaceans, insects, arachnids, and centipedes 节肢动物; 节肢动物门的无脊椎动物，包括甲壳纲、昆虫纲、蛛形纲和蜈蚣亚纲等