<p><strong>Noun</strong></p><ul><li>Any crustacean of the order Decapoda, having five pairs of walking legs, including the crabs, lobsters, crayfish, prawns, and shrimps.</li><li>Any dibranchiate cephalopod having ten arms, as the cuttlefish or squid.</li><li>(Initial capital letter) A steam locomotive having a two-wheeled front truck, ten driving wheels, and no rear truck.</li></ul><p><strong>Adjective</strong></p><ul><li>Belonging or pertaining to the decapods.</li><li>Having ten feet or legs.</li></ul>