A benign neoplasm that involves the mouth floor. The disease is Monarch Disease Ontology term MONDO_0021520 (benign neoplasm of floor of mouth). Also known as: benign floor of mouth neoplasm, benign floor of mouth tumor, benign floor of mouth tumour, benign floor of the mouth neoplasm, benign floor of the mouth tumor, benign floor of the mouth tumour, benign neoplasm of the floor of the mouth, benign tumor of floor of mouth.