betweenbrain between decks • betweenity · · · Info · Definitions · Synonyms · Characters · · betweenbrain · · Text Latin · · Script 12 · · Length 3 · · Syllables Definitions · · · (noun) the posterior division of the forebrain; connects the cerebral hemispheres with the mesencephalon. Synonyms: diencephalon, interbrain, thalmencephalon. · · Noun Definition 1 Synonyms · · · diencephalon · · Synonym 1 interbrain · · Synonym 2 thalmencephalon · · Synonym 3 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074 w latin small letter w U+0077