noun retÂ·roÂ·gresÂ·sion \Ëre-trÉ-Ëgresh-Én\. : a reversal in development or condition: asa: return to a former and less complex level of development or organizationb: subsidence or decline of symptoms or manifestations of a disease.
Habitat. Slime molds live in somewhat variable habitats all over the world. Generally slime molds live in damp areas of vegetation. They live under rotting logs and damp leaves. Some of the other habitats that slime molds will inhabit include water such as tropical fish tanks.
In more strict terms, slime molds comprise the mycetozoan group of the amoebozoa. 1  Mycetozoa include the following three groups: 2  Myxogastria or myxomycetes: syncytial or plasmodial slime molds. 3  Dictyosteliida or dictyostelids: cellular slime molds. 4  Protosteloids.