Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
brain-stem is a noun meaning "the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamus". It carries one recorded sense.
the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamus
Definitions, synonyms and semantic relations for brain-stem come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.