Arthropoda

noun plural

Ar·​throp·​o·​da är-ˈthräp-əd-ə 

: a phylum of invertebrate animals (as insects, arachnids, and crustaceans) having a segmented body and jointed appendages, usually a shell of chitin molted at intervals, and an anterior brain dorsal to the digestive tract and connected with a ventral chain of ganglia

arthropod

ˈär-thrə-ˌpäd 

adjective or noun

arthropodan

är-ˈthräp-əd-ən 

adjective