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Arthropoda British & World English

A large phylum of invertebrate animals that includes insects, spiders, crustaceans, and their relatives. They have a segmented body, an external skeleton, and jointed limbs, and are sometimes placed in different phyla

Arthropoda in arthropod British & World English

An invertebrate animal of the large phylum Arthropoda, such as an insect, spider, or crustacean

Arthropoda in Chelicerata British & World English

A large group of arthropods that comprises the arachnids, sea spiders, and horseshoe crabs. They lack antennae, but possess a pair of chelicerae, a pair of pedipalps, and (typically) four pairs of legs

Arthropoda in trilobite British & World English

A fossil marine arthropod that occurred abundantly during the Palaeozoic era, with a carapace over the forepart, and a segmented hind part divided longitudinally into three lobes

Arthropoda in tongue worm British & World English

A flattened worm-like parasite which infests vertebrates, especially reptiles, having a sucking mouth with hooks for attachment to the lining of the respiratory tract