ring rot fungus ring·rot·fun·gus uncommon noun 1. fungus causing soft watery rot in fruits and vegetables and rings of dry rot around roots of sweet potatoes Synonymsleak fungusring rot fungusRhizopus stolonifer Related words Broader terms rhizoid Parts genus Rhizopus WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
