hindbrain hindberry • hindcast · · · Info · Definitions · Synonyms · Characters · · hindbrain · · Text Latin · · Script 9 · · Length Definitions · · · (noun) the posterior portion of the brain including cerebellum and brainstem. Synonyms: rhombencephalon. · · Noun Definition 1 Synonyms · · · rhombencephalon · · Synonym 1 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 d latin small letter d U+0064 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E r latin small letter r U+0072