ventriculostomy

noun
ven·​tric·​u·​los·​to·​my | \ ven-ˌtrik-yə-ˈläs-tə-mē How to pronounce ventriculostomy (audio) \
plural ventriculostomies

Medical Definition of ventriculostomy

: the surgical establishment of an opening in a ventricle of the brain to drain cerebrospinal fluid especially in hydrocephalus

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