decapod

noun

1. any crustacean of the order Decapoda, having five pairs of walking legs, including the crabs, lobsters, crayfish, prawns, and shrimps.
2. any dibranchiate cephalopod having ten arms, as the cuttlefish or squid.
3. (initial capital letter) a steam locomotive having a two-wheeled front truck, ten driving wheels, and no rear truck.

adjective

4. belonging or pertaining to the decapods.
5. having ten feet or legs.

noun

1. any crustacean of the mostly marine order Decapoda, having five pairs of walking limbs: includes the crabs, lobsters, shrimps, prawns, and crayfish
2. any cephalopod mollusc of the order Decapoda, having a ring of eight short tentacles and two longer ones: includes the squids and cuttlefish

adjective

3. of, relating to, or belonging to either of these orders
4. (of any other animal) having ten limbs

n.

1835 as a type of crustacean having 10 legs, from French décapode (1806), from Modern Latin Decapoda (animalia), from Greek dekapoda, neuter plural of dekapous “ten-footed” (see ten + foot (n.)). From 1888 as a type of locomotive.

1. Any of various crustaceans of the order Decapoda, characteristically having ten legs, each joined to a segment of the thorax. Crabs, hermit crabs, lobsters, and shrimp are decapods.
2. A cephalopod mollusk, such as a squid or cuttlefish, having ten armlike tentacles.