class Diplopoda class·dip·lo·poda uncommon noun 1. arthropods having the body composed of numerous double somites each with two pairs of legs: millipedes SynonymsDiplopodaclass DiplopodaMyriapodaclass Myriapoda Related words Broader terms class Parts Arthropoda Part of millipede WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.