long bone long-bodied • long-borne · · · Info · Definitions · Synonyms · Characters · · long bone · · Text Common · · Latin · · Scripts 9 · · Length 2 · · Syllables Definitions · · · (noun) in limbs of vertebrate animals: a long cylindrical bone that contains marrow. Synonyms: long bone, os longum. · · Noun Definition 1 Synonyms · · · os longum · · Synonym 1 Characters · · space U+0020 b latin small letter b U+0062 e latin small letter e U+0065 g latin small letter g U+0067 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F