frontal bone frontal • frontal cortex · · · Info · Definitions · Synonyms · Characters · · frontal bone · · Text Common · · Latin · · Scripts 12 · · Length 3 · · Syllables Definitions · · · (noun) the large cranial bone forming the front part of the cranium: includes the upper part of the orbits. Synonyms: frontal bone, os frontale, forehead. · · Noun Definition 1 Synonyms · · · os frontale · · Synonym 1 forehead · · Synonym 2 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 r latin small letter r U+0072 t latin small letter t U+0074