A mixture of "arthropod" and "-ian", "Arthropodian" means "related to arthropods". "-ian", which is descended from "-anus", is Latin. "Arthropod" is based on a fusion of two Ancient Greek words: "ἄρθρον" ("árthron"), which translates to "joint", and "πούς" ("poús"), which is "foot". "Arthropodian" thus translates to "one with jointed feet". "Arthropodian" alternatively is spelled "arthropodean". There is no technical difference between them, but as "arthropodean" is the established spelling for "related to arthropods", "arthropodian" is more often used for fictional anthropomorphic arthropods.