third ventricle
US /θɜrd ˈven.trɪ.kl̩/
UK /θɜrd ˈven.trɪ.kl̩/

1.
第三脳室
one of four connected fluid-filled cavities comprising the ventricular system within the human brain. It is a median slit-like cavity between the two thalami, in the diencephalon.
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Cerebrospinal fluid flows from the lateral ventricles into the third ventricle.
脳脊髄液は側脳室から第三脳室へと流れる。
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Tumors in the third ventricle can cause hydrocephalus.
第三脳室の腫瘍は水頭症を引き起こす可能性がある。