n.; pl. myxobacteria A type of bacteria that form colonies in self-produced slime; they inhabit moist soils or decaying plant matter or animal waste. Syn. -- myxobacterium, myxobacter, gliding bacteria, slime bacteria. [ WordNet 1.5 ]
n.; pl. mycobacteria Any of various rod-shaped bacteria, some saprophytic or causing diseases. [ WordNet 1.5 ]