Originally (in form Myxobacter): a genus of slime-producing bacteria having rod-like spores (now historical). Later: = myxobacterium .
Forms originally described under this genus name are now included in the genus Polyangium (or other genera of the family Polyangiaceae) of myxobacteria.
Late 19th century. From scientific Latin Myxobacter from myxo- + bacter- (in bacterium).