forebrain forebrace • forebreast · · · Info · Definitions · Synonyms · Characters · · forebrain · · Text Latin · · Script 9 · · Length 3 · · Syllables Definitions · · · (noun) the anterior portion of the brain; the part of the brain that develops from the anterior part of the neural tube. Synonyms: prosencephalon. · · Noun Definition 1 Synonyms · · · prosencephalon · · Synonym 1 Characters · · 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 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072