fibroma Syllabification: (fi·bro·ma)Pronunciation: /fīˈbrōmə/Definition of fibroma noun (plural fibromas or fibromata /-mətə/) Medicine a benign fibrous tumor of connective tissue. Derivatives fibromatous adjective Origin: mid 19th century: from Latin fibra (see fiber) + -omafibroma in other Oxford dictionaries Definition of fibroma in the British & World English dictionary