flat bone flatboat • flat-bosomed · · · Info · Definitions · Characters · · flat bone · · Text Common · · Latin · · Scripts 9 · · Length 2 · · Syllables Definitions · · · (noun) part of the sirloin next to the wedge bone. Synonyms: flat bone. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 e latin small letter e U+0065 f latin small letter f U+0066 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F t latin small letter t U+0074