Definitions for myxomycetes
Myxomycetes, class Myxomycetes(noun)
the class of true slime molds; essentially equivalent to the division Myxomycota
U.S. National Library of Medicine
A division of organisms that exist vegetatively as complex mobile plasmodia, reproduce by means of spores, and have complex life cycles. They are now classed as protozoa but formerly were considered fungi.