red bone marrow redbone • red-bonnet · · · Info · Definitions · Synonyms · Characters · · red bone marrow · · Text Common · · Latin · · Scripts 15 · · Length 4 · · Syllables Definitions · · · (noun) bone marrow of children and some adult bones that is required for the formation of red blood cells. Synonyms: red marrow, red bone marrow. · · Noun Definition 1 Synonyms · · · red marrow · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 d latin small letter d U+0064 e latin small letter e U+0065 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 w latin small letter w U+0077