chytridiomycosis noun1 •An infectious disease of amphibians caused by Batrachochytrium dendrobatidis (amphibian chytrid fungus) or (chiefly in salamanders and newts) by Batrachochytrium salamandrivorans.In epidemic outbreaks and when it is present as an endemic, vulnerability to chytridiomycosis caused by B. dendrobatidis varies widely among species. — 2010 formschytridiomycoses