myxobacter my·xo·bac·ter uncommon noun 1. bacteria that form colonies in self-produced slime; inhabit moist soils or decaying plant matter or animal waste Synonymsmyxobacteriamyxobacteriumgliding bacteriaslime bacteria Related words Word family MyxobacteralesmyxobacteriaMyxobacteriaceaeMyxobacterialesmyxobacterium Broader terms eubacteria Parts order Myxobacteria WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.